[hk__2]

> Even better, flipping "public/private" has absolutely no need to delete any information at all.

Of course it does. You can’t watch/star a private repo unless you have access, so all watchers/starrers should be removed. If you kept the data as-is watchers would still see the repo updates in their feed, which is the opposite of the 'private' feature promise.

[alpaca128]

Sure, if you don't change any part of the system it has to be that way. But there's no reason a private switch can't just suspend stars/watchers instead of permanently deleting them.