I was about to say this is established lore and one of the funniest retcons in media out there

But the comments are still separated out by community in the example post. You can still see the discussion in !technology@lemmy.world as a stand alone, isolated discussion, but if you scroll further you also get the !AskUSA@discuss.online. I assume if you reply to a comment, you’re then replying in that community, but I didn’t test that.