@kissane all this. everything you lose in an account migration gets glossed over, as if the transition were lossless. seems to be an odd taken-for-granted thing that you don't care about your old writing (for example).
(also, just to check: you know you can cancel a redirect and fully reactivate an old account, after you migrate? took me a while to figure out, hence asking. I have an alt or two that live on post migration.)
@hugo I know you can cancel, but I’m not clever enough for a full multiverse, myself—I should look into how that works, though