As someone who has also been running a Misskey server for a little while, I've observed that whilst the resouce usage is a little higher than other federation softwares such as Pleroma, the stability is amazing, even on the development branch.
There are some features missing however that I've grown accustomed to. Functionality that I quite often find myself using on a Pleroma based installation such as leaving internal comments on reports, easily being able to mark posts and media as sensitive and different levels of instance specific blocks (media removal, hidden from public timelines, follow only) are either hidden or not implemented as of yet within Misskey but the development of this software currently seems to be adding in all of the community recommended features that we feel are missing.
Whilst I'm not 100% happy with Misskey in it's current state, I think it's only a matter of time before all of the most popular missing features have been implemented and it become a viable replacement for other more mature fediverse softwares.
There are some features missing however that I've grown accustomed to. Functionality that I quite often find myself using on a Pleroma based installation such as leaving internal comments on reports, easily being able to mark posts and media as sensitive and different levels of instance specific blocks (media removal, hidden from public timelines, follow only) are either hidden or not implemented as of yet within Misskey but the development of this software currently seems to be adding in all of the community recommended features that we feel are missing.
Whilst I'm not 100% happy with Misskey in it's current state, I think it's only a matter of time before all of the most popular missing features have been implemented and it become a viable replacement for other more mature fediverse softwares.