It's be nice if there'd been some discussion first, and perhaps a solution other than an admin vanishing a community without notice. Even just some text informing the user "You can't see this content on lemmy.world. Please go to the instance directly".

Regardless if the decision is understandable, the method used here is not going to sit well with people. After how many years of spez, these kinds of behind the scenes snap decisions that change the site overnight with no apparent regard for the community is going to leave a bad taste in people's mouths. It wouldn't have hurt to bring it to the community rather than just shadow banning without a word.

Not even because there needed to be a discussion, but just as a basic courtesy.

It doesn't inspire confidence or endear the instance to its users.