Changing from one account to another takes… let’s see: click on the icon, pick an account, done. 2 seconds? yeah, something like that. You had to setup the accounts beforehand, but I’m guessing the same thing happens with PluralKit, doesn’t it?

Is it going to retroactively change the username and pfp on the old messages?

Each account/user has their own setup, so… yes? no? Not sure what you mean.

Imagine I’m having a discussion with some friends, two of whom are in a system, I step away to go to the toilet, and when I come back 5 minutes later I can’t tell who was talking in the last 5 minutes.

Not sure I follow. How does PluralKit do it? Does it create a separate user for every message?