Depends on what you want. some places you can find just as high quality. There is a lot of junk out there to wage through. They also have a "allergic reaction" to the thought of an algorithm to curate feeds which throws the good out with the bad.

I would very sincerely ask what places and what quality?

More like which niche. I find transit advocates do a lot on mastodon. There are also a lot of great open source projects (the curl maintainer posts some interesting stuff). Those are niches I'm interested in though, YMMV in anything else.