Quote Originally Posted by Anteiron View Post
Emet Selch says at the end of Endwalker: "Some of che civilizazion in the reflections will surprise you"

So I think Solution 9 comes from another reflection. The other worlds have not had calamities, so it is likely that their civilization has advanced to a very high technological level.
The problem is how it arrive to the source
The "problem" is that people keep drawing this flimsiest of connections to a line that is probably just paving the way for us to actually visit other reflections (plural) in the future. It also assumes that we're going to burn through all of Emet's sightseeing recommendations in a single expansion and leave nothing for later.

Additionally, after Y'shtola has put so much work into devising a way to cross the rift, it seems unfair to just drop the answer in her lap from a civilisation that already has it figured out.