I read through a bit - it's all very interesting reading through case studies of cool mythic empowerment stories and enlightenment things and the nested disambiguation pages of the magic of that the Summer empire uses, but it's not super helpful, though there's definitely some usable information. Mythos can definitely work to pass on things, even things that work a little differently to how you do it - part of how the air-dancers work is the bond of legend with the saremites and their students, as something engraved upon the world that they ought to be able to do, because Sun and Sky trained them right, which seems at least a little encouraging. The evidence for the more mundane stuff is... less clear, though it's rare enough that people stay ordinary around figures of myth in these things that it seems tentatively like there might not be a need for it?
It probably also works best with a narrow descent of a specific magic system, especially if you don't try to overload any sort of inheritance with too many filters, which seems obvious enough, and it's maybe a bit more complicated to keep on doing distinct empowerment chains, though it's kinda unclear how much that's just that people want to make the first things they create the proper solution, or even just that people don't keep track of immortals projects too well, especially if those don't end up being immortal themselves.
It's... kinda sad, how set the circles of concern can get, for these people.
I hope we don't end up like that...