added in March of last year, and not sure about third party apps since I use the official interface. I find it very useful though, between that, hashtags, public lists of people to follow, and boosts, I set my feed up in about 6 hours and it’s been on minimal-maintenance-mode since and serving me fine. depends on how much the niche communities you like adopt the Fediverse too, YMMV!
one UX improvement is also in replies. I comment from Mastodon, and because I’m replying to you my post will be federated to feddit.uk but not to your parent comment on feddit.de or the OP on lemmy.ml :|