Vacuum decay, or vacuum metastability event is the possibility in simple terms that the universe itself is not in in its ground state. If that's true, it might spontaneously change to its real ground state. Doing so will change fundamental things like the strength of electromagnetism, the weight of particles and so on. It would literally destroy everything in the universe, and we couldn't exist in what's coming after.
Good news, we're confident, that's probably not going to happen.
Those recommendation systems have lots of problems, I agree, especially if they optimize for monetary benefit of the platform above all else.
But you need them if you want to have interesting stuff recommended, simple as that. I can't (and have no interest to) read every Mastodon post ever, same for Lemmy. And I admit it, I don't even want to read every post my friends make.
Mastodon feels like a torrent of random unrelated comments drowing out anything that might be interesting. I tried it, I don't see any value in it. Even for following friends it's unusable, there is the one that posts three times a day and the one that posts once every three weeks, there is no way to ever see one of his posts, unless I specifically go to his profile to look. I've given up on Mastodon.
I once broke my Ubuntu install by trying to convert it KDE Neon, that reinstalled half my packages and left it in an basically unusable state. I then un-broke the install while upgrading multiple Ubuntu releases, that reinstalled the other half as well. It actually worked, and I'm still using that install.
Hochspannungsgleichstromübertragungsanlage. But I have to admit defeat here, Hochspannungsgleichstromübertragung does get abbreviated as HGÜ, so almost nobody would write Hochspannungsgleichstromübertragungsanlage but rather HGÜ-Anlage, even if Hochspannungsgleichstromübertragungsanlage is a perfectly cromulent word.
No, you're perfect.