User blog comment:MisterWoodhouse/The first Unified Community Platform release is now live for NEW wikis/@comment-29596046-20200324223032/@comment-25252539-20200325174459

That's because you aren't prepared for that, you should build a wiki that is simple enough to maintain so when you move to newer platform it doesn't cause way too much technical debt.

I build my wiki in a way that doesn't rely too much on CSS/JS (actually 0 CSS/JS) so when it comes to things like major updates like this, I won't be screwed by huge amount of reworks.