Some reasons why I frequently prefer communicating via text

Beyond just the ability to quote things, I also appreciate the "perfect memory" aspect of text. The question of "did x say y?" is trivial to answer on any textual platform with a search feature. "I thought I said... oh, looks like I actually didn't" helps me update my own beliefs about my communication, and "wait, what did you say that I interpreted as x? oh, that, I see what went wrong" helps me do better in similar communications on later occasions.

some counter-arguments, in no particular order of importance:

1. Verbal communication is quite often more succinct, because it is easier to exhaust the vocal medium, and you can see in real time your conversationists getting bored with your rambling.
2. Verbal communication allows far more nuance carried with tone, body language, and social situation, thus often delivers the message most clearly. I find it most useful when discussing Ethics: everyone is a clinical utilitarian when typing, but far more humanistic when they see the other person's facial reaction to your words.
3. Rhetoric and charisma do not carry well over text. Most Rationalists consider it beneficial, right until the point where they need to explain something, or convince non-Rationalists and completely lack the tools to do so. Avoiding the use of verbal rhetoric and not training your in-person charisma is the surefire way to become very unconvincing to the general audience: case in point, every attempt by explain AI Risk to "muggles" by somewhat introvert and dry-talking Rationalists.
4. Related to point 3: conversational charisma is the main tool used by human males to woo women. By not practicing conversational charisma, Rationalists ensure they will breed themselves out of existence.
5. Most child-rearing and education is oral communication. Without practicing it, the Rationalist will not make a good parent or a teacher, and thus, from civilizational perspective, had squandered his rationality.
6. Rubberducking: saying things out-loud quite often leads to epiphanies, especially negative ones ("wow, my cherished idea sounds really dumb when I say it out, loud."). Writing down, and then reading your own ideas often leads to an emotional feedback loop in which you reinforce your own conviction rather than nit-picking your own idea. This leads to...
7. Oral communication avoids the risk of Rabbit-Holes. When writing, uninterrupted, it is easy to accidentally pick a logical mistake as the crux of your whole argument, and waste hours exploring it. In conversation, your partner/opponent can snip that in the bud. 
8. Op-Sec. Oral conversation is far less likely to get you in trouble for the things you say, unless you are being recorded. Meanwhile, a text based conversation, especially on a social platform is a Sword of Damocles always hanging over your head. Say the wrong thing, and at worst a dozen people will consider you an ass. Write and post the wrong thing, and you might, decades from now, lose your job, your social standing, or even your life. An innocent comment today might make people cancel you in 2040, or a vengeful Basilisk mulching you in 2045.

I find that, with oral communication, especially in groups, you frequently just end up in a "tangent frenzy" instead of discussing any one thing to something that at least vaguely resembles completion.

I like this description, and yes I hate the same thing.

I was told that the secret to being good at conversations is to be a good listener. But in groups, it doesn't matter anyway, because someone else will change the topic along a tangent.

I suspect that the true goal of group talking is to establish dominance hierarchy. People who successfully change the topic are high-status, people who try resisting the change and fail are low-status.

Related - https://www.quora.com/Why-do-some-people-prefer-online-interactions-to-real-life-interactions/answer/Alex-K-Chen

In the defense of oral conversations (especially in person), any conversation dealing with emotions is much easier for me in person. There is so much to be wrongly interpreted through text : an emoji with many possible interpretations, the meaning of a dot at the end of a sentence, guessing the actual emotion of the other person behind the text… I think there are many ways to misinterpret a text and the amount of text required to make sure your message is correctly understood is often greater than if the person was in front of you + it can be annoying (for the sender and the receiver) to justify everything you‘re writing to make sure it’s not misinterpreted. 
 

To summarise, I think a written message will more often be misinterpreted than the same message said in person because there is more information in the latter : the person’s face and intonation. And to achieve the same chance of correct interpretation through text would require a longer message that often makes it feel "bloated".

I think there is something about textual communication that is more meritocratic. It better holds people accountable. If you say something dumb, someone else can easily call it out in a thread, and if you don't respond to that thread, well, it kinda just sits there and makes you look bad. Sort of. On the other hand, in oral communication, you can say something dumb, the conversation moves on, and people don't get a proper chance to call you out for the dumb thing.

Related: Four Layers of Intellectual Conversation.

You can go deep with voice communication, but I think that in-person communication is best for when you want to survey a topic. The quick feedback, and the necessity to lead with your best points, allows for rapid exploration of an idea space.

Moderators really help keep a group on-topic. I used to run a discussion group, and it wasn’t too hard to steer people back on track. Then again I suppose that’s true for most group discussions, no matter the format.