As much as people meme about indie avengers, I think if ex holos want to maintain their numbers, they need to form a reliable collab group. Half the appeal of watching Hololive is not just watching your oshi, but watching your oshi interact with other girls. And this concept isn’t unique to Hololive either, even twitch indies famously do this (3am, barbies, whoreclan, Vedal’s harem, etc).