What's the point with that quite lackluster story in Endwalker?

[KizuyaKatogami]

You give the sundered to little credit. They've weathered 7 calamities, the Final Days, innumerable battles against beings more powerful than they, all without the promise of immortality or paradise. The Ancients broke when faced with that fact.

It’s almost like for a majority of this, they had help from higher up entities, more notably the ancients of whom you seem to think weren’t as good lol. Along with other unsundered beings like dragons and high tech from a civilization helped by another higher up being, or even a god-like deity.Also lets not act like its the sundered as a whole capable of doing this. Its WoL and the scions and maybe a couple others, and keep in mind the WoL isnt even fully sundered as hes rejoined partially. The 7 calamites theyve "weathered" were 7 times they failed. 8UC is just yet another time they failed and needed to almost sacrifice an entire timeline's worth of people just to bring the one person they can rely on back.

[Lauront]

Yeah, can't imagine why you'd want to move away from that and restore what once was when you have the means to do so and nothing but platitudes arguing otherwise...

That's actually something I never even thought about. But yeah, from the look of it the only things you need in order to use Dynamis are... knowing it exists and having a low enough aetheric density to affect it. Since they already had the means of Sundering if it was necessary (Venat/Hydaelyn) as well as the knowledge of Meteion's location (again, Venat), all the Ancients would've needed is a means of traveling to Ultima Thule, which probably wouldn't have been too hard to accomplish for them, either.

And at worst, if they had no other solutions whatsoever, you're talking selectively sundering maybe a few of them. Not the entire star and civilisation.