As someone who really enjoys PeerTube, I also feel like the technical barriers to it being as popular as other platforms are a bit tougher to overcome.
I would love for it to be more popular. I also know it's really hard to convince content creators and live streamers to embrace it.
I love PeerTube. I have been trying to help the projects however I can. I also know that the economics of moving to PeerTube is quite different. Very few people make money microblogging (Twitter). Very few people make money posting to Reddit.
Streaming on Twitch or YouTube, or making content for YouTube can and for many people does bring in money, though. Creating an ecosystem where viewers are willing to pay, while increasing viewer counts of content so that sponsorships can be more common, all while trying to slowly convince people that we should be supporting things financially that up to now has been "free(not really, but experientially it 'feels' free)" is a lot of work.
I plan on supporting PeerTube as much as I can in the future. I want it to grow. Maybe someday, it will get there. I can hope.