User blog comment:MisterWoodhouse/Social Activity, the 2010 Editor, and Unpausing Migrations/@comment-43988371-20200926052300/@comment-24155515-20200927083505

Some user CSS (maybe wiki-wide as well, unsure) may break because I've noticed that with a few things in my personal CSS--I bet a few classes changed.

Overall, though, I imagine catastrophic changes won't occur until the stage where they're introducing a new skin.