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.
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.
When I read this the first time I thought it read:
Google Blog: 8 ways we're making daily tasks more miserable