I have neither used it nor investigated it, just read some of the posts announcing it, and also heard about stability issues second hand. When I read the initial announcement, I remember a good handful of lib’d up features, but I do not claim that all are that way.

Piefed.social, the largest instance by default blocks hexbear and lemmygrad - but other piefed instances may remove these blocks if they so choose. Dbzero already has a mirror server set up on piefed software.

And yeah, it had issues a month or so ago, but it’s as stable as any lemmy instance since then.