Related to your first point: that’s why I believe the Peertube’s aproach (and old Deviantart’s too) is the best: every user has a single account, but they can have many “channels”/streams/folders/tags that you can follow. That way, you can follow someone’s specific content and not everything they do. I think tumblr did/does the same too, in addition to allowing you to follow tags.
Related to your first point: that’s why I believe the Peertube’s aproach (and old Deviantart’s too) is the best: every user has a single account, but they can have many “channels”/streams/folders/tags that you can follow. That way, you can follow someone’s specific content and not everything they do. I think tumblr did/does the same too, in addition to allowing you to follow tags.
a more simple system :
Hmm… It does work as folders and channels in other platforms and it is very simple. The biggest con I find is that many people like to tag a lot :/