Jury is still out on Twitter. It very well could fail.

It just didn't happen the instant Musk entered the building. This type of thing usually happens on longer timeframes. Digg died unusually fast.

If an instance does off because Meta won't defederates from it, then it probably would have died off anyway.

It would be a shame if subreddits changed their rules to make photos of Tiennamen Square mandatory in all posts.

Not yet. I wouldn't be surprised if they were trying to build an automated way of doing this.

As if people won't figure out creative ways around that...