> Right now, if you want to become an editor of Wikipedia, you simply need to have a passing familiarity with wikitext

Wikipedia have had an WYSIWYG editor for years.

> if you want to become an editor of Abstract Wikipedia, you'd need to have an in-depth knowledge of lambda calculus, and possibly a Ph.D. in linguistics

No this is not how it's intended. First the data itself is supposed to be from Wikidata which is super simple to edit. Secondly surly they can come up with an UI for the other parts.