I've never really been one to get obsessive about numbers, some of my favorite vtubers don't even have 20k subs. But I will say it is very encouraging to see that in less than a day, Doki has already regained 25% of the subs she had as Selen, and undoubtedly more to come in the future. It shows that corpos are no longer capable of stifling this stuff - if someone wants to leave, they will easily regain their old audience. Possibly more, since there are a lot of tribal people who will refuse to watch someone on principle just because she's in a hated corporation. Which is sad, but it does happen. I know they probably won't, but corporations need to learn that they had better do everything they can to keep their talents around and treat them well, otherwise it gets to the point where they actually gain more from leaving than from staying and then what's the point of a corporation at all? In Nijisanji's case, they hardly gave them anything and have become too reliant on the idea that people won't want to leave their "family" and lose all the friendships they've made there. For a time people were willing to put up with that, but it's clearly not enough anymore. Of course, this applies to every corpo, not just Nijisanji. There's only a couple I can think of that really incentivize their talents to stay.
Anyway, my point is, I'm happy to see how easy it has to migrate Selen's fanbase over to Dokibird. The vtuber community has realized there's no business to keeping secrets anymore, all it results in is the old fanbase running around like a chicken with its head cutoff and months later you still get straggler posts from people who say "I miss Selen" and have no idea that she's still streaming. It is very important to broadcast loud and clear that she has moved to a different account, and from the looks of it, it's working. A ton of people have followed her there. The tactics used were highly effective. Considering that not all of her 800k subs were necessarily still active, I'd say if she can make it to half that, then I will feel confident that 100% of her active fanbase was able to find her. And she looks like she is on pace to do so.