This is really funny to me because I DID try to port a bunch of my features (including horizontal navigation) to XKit Rewritten but nobody there ever reviewed them and most of them eventually went stale and then closed when I removed my fork.
in reply to @minecraft's post:
Mhm, obviously it's an open-source project so I can't really stop anyone from remaking the features, but y'know, take the hint that if the people are doing all the work are leaving, maybe Tumblr isn't exactly the best platform.
Although, the chances of any of them actually getting ported are probably slim given the fact that XKit seems to be more taking the direction of cozying up to staff and maintaining the status quo rather than the more avant-garde "power to the user" features I designed. Along with the fact, again, that they had the opportunity to add in a bunch of my features with a single click for months and never bothered (including timeline search, a feature I initially wrote FOR XKit and then adopted myself when they ghosted me).