I always hated "15 minutes of real-time conversation", not because of being an introvert or anything, but because it's fuzzy, nobody remembers what it was exactly said, and usually ends up with people wasting each others time (like Diltert-style meetings).
I'd much rather people knew how to communicate effectively on chat.
But people don't, so you get messages like:
"The service is broken!"
"[panicked] What do you mean? Is it down?"
"It doesn't show anything"
[still panicked] Really? Let me see... Hmm, I see it working properly, loaded the first page and everything. What do you see?"
"I don't see anything"
"[???] On the first page? On some specific panel? Have you entered something?"
"Entered? I clicked and got nothing"
... and after 20 more minutes you realize they are on the third tab of a particular page, which nobody ever uses, have entered some search term people seldom enter, and got no results there, and everything else is working fine...