>>396984I imagine it'll be kinda like the fan stuff MLP had. Really big right now and probably will stay that way for another year or two. Once the newness wears off and Covid is finally over I imagine alot of people who just want to chase trends will move on and quite a few of the smaller and independent ones will be forced to move on.
Biggers ones that are tied to companies will probably be around until 2023 to 2025, until either graduating for health reasons, changes in social standings (ie marriage) or just wanting to do other things. Avatar streaming will be around for a long time, but I doubt it will be quite like this current crop. There will always be new people discovering it as an alternate way to get attention/be famous or make money who will jump onto the trend and try to maximize the niche.
I do imagine that some VTubers will probably try to make this their life career. Marine and Pekora come to mind, the former will probably avoiding returning to the Toxic Japanese work culture with all her ability and the later is so socially stunted that I doubt anything else is reasonable for her. Gura as well, though she'll probably drop the current character and do a different one with decent success because based on her prior exploits she seems to know how internet culture works and can abuse that.