User blog comment:MisterWoodhouse/The first migrations to the Unified Community Platform/@comment-31617896-20201024194528/@comment-1038387-20201026133118

That's a legitimate point of criticism not unrelated to UCP per se. One that could, given proper arguments, be changed.

A counter point I've seen to that is, because Discussions does not have an accessible history, allowing people to edit long after posting could lead them to misrepresent their past words, which would be somewhat problematic in controversial discussions. Which of the two is more valid I'll leave in the middle.