Older wikis if you go Special:AdminDashboard have "Wiki Features" in the first "Wiki" row preceding the "Community" row, but if you visit the dashboard of newly created wikis you manage then it doesn't have a 'Wiki Features' button.
Furthermore when you click edit there's always this blue loading bar which lags for 1-2 seconds which is kind of annoying to wait for every time.
Old style editor doesn't lag like that, how can I revert to using the old-style non-laggy screen on these new wikis?
Also no 'add features and media' on right to easily add stuff. "Source Editor" on new wikis does have an image icon next to the link icon which allows uploading but it works very very slowly and it is hard to make rapid contributions this way.
The only fast way I can figure is to upload 1 image, manually insert gallery tags, and then add things to the gallery, because additions to existing galleries seem to be added in fewer steps than the standalone image uploading icon.
Edit: on doing some digging I think this might relate to it https://fandom.zendesk.com/hc/en-us/articles/360044776693-IMPORTANT-Wikis-created-after-March-11-2020-are-based-on-a-new-technology-platform
Got some insight at Thread:1851588 in May but could not bump due to 60 days passing.
I think maybe I want to be able to use forked 1.19 instead of 1.33 per Tupka's mention? But Andrew said it's not possible to switch back.
That also might answer my question of what UCP stands for...
This rigidity makes me wonder, are old wikis going to be eventually forced to use this laggy new editor? It's very pretty but perhaps it is aimed at high-speed comps/connections that make it load instantaneously? Still lags on 8GB RAM and 50Mbit download though, what specs are needed to axe this delay?