I guess Safari might be kinda behind (either that, or browsers feom that time period just can’t run lemmy-ui), since for me, the browser that breaks using lemmy-ui but works using mlmym is Firefox 54.0.1 from 2017.

How old is your browser? Also it didn’t work with browsers from the early 2010s and earlier unfortunately (probably not top priority, but…).

Probably because Twitter is big, and LemmyWorld is small and also the fact that the rate limits are probably reasonable in LemmyWorld, compared to twitter.