I keep writing I can do with a 420 character limit.
I keep writing anyone can multipost in one's Profile.
Therefore, there is no limit in what one can post in a Profile.
If you want to effortlessly send a 2k character message, then I suggest you use PM (=Conversation). That way, you can use BB codes too. I am pointing out, Conversations are not restricted to two individuals only.
Automatic Profile Post comments splitting would allow to avoid the 20 second wait time. Plus, it might make a wall of text more readable, by automatically splitting it into chunks.
I believe you simply want some parts of the old Hive back, am I right?
Seems not to be satisfying for everybody.
Heh, even the infinite could be an arbitrary limit, since there might exist an infinite+1