And discoverability, it still has ways to go on the social networking integration. I still don't know how to go from watching a peertube video on a peertube instance to liking/boosting it on another fediverse service, even if I wanted to.
That said, I have been following Peertube for a couple of years, and the progress has been incredible. It makes sense to create a solid foundation for video playback first, and a lot of people seem to not understand the extent of the innovation Peertube has made in that regard. Social media tools obviously come second after providing a solid service, and I have no idea it will develop in great ways in the coming years. :)