Originally Posted by
Cleretic
It's actually stated after Emet's death that he wasn't maintaining Fake Amaurot, he'd just created it with enough aether that it kept standing afterwards. It's going to disappear eventually, but until then, it keeps standing.
Also, Hythlodaeus knows Emet's last words because we tell him. There's a cut in the Etched in the Stars cutscene where the WoL explains recent events.
As for 'how your band of misfits survive'... I don't even know what you're talking about, so I'm going to scattershot all the simple explanations for what you could be saying that I can figure.
Yeah, I think Emet's gonna be a presence in Endwalker, even if I really, sincerely wish he wouldn't be. But it's going to be a posthumous presence, probably in Echo flashbacks or recordings in Mare Lamentorum (or whatever other Ancient structures we find). He's not coming back for some last laugh--and if he does, frankly, I quit.