User blog comment:MisterWoodhouse/The first Unified Community Platform release is now live for NEW wikis/@comment-44264338-20200505223423/@comment-1807002-20200505233426

I agree the new source mode is disgusting; I'd say most people don't like it or even hate it. I have only see one person like it and one think it is ok (but they did tweaks to make it ok). But this has to be mentioned and feedback given (in these blogs or the feedback post's like this) if we ever hope to have something at least close to before. I am thinking half- if not most of the problem is source mode is really just visual editor in source more/a JavaScript source mode.

Sadly there is no way to make wikis on old platform. Best thing is finding an old wiki on the old platform and adopting one of similar topic or if it has no content just rename it to match your topic. But eventually all wikis will be on the UCP and unless they listen to our feedback about the source editor- you might be right back where you started.