I can't wait for peertube to take off. I think of all of the social medias, youtube has the most enduring monopoly, because hosting is such a huge barrier it's got even more of a natural monopoly than regular social media.
I think once peertube can start ascending that might be the ballgame for decentralised social media in general.
That is very true, and I think some kind of archive is going to be important eventually. I think to get around the hosting costs, one method could be for peertube instances to form a union of instances for collective purchases, because the cost goes down with scale.
With a large enough group you could even split hosting among different providers to prevent a monopoly from forming in the hosting space.