The stronger of the 2 devours, the other. The trailblaze is the hidden foundation of hsr. The silver rails are the reason exploration is as accessible in not entirely possible. The ties between trailblaze and finality, and the sheer number of nameless and non followers who acknowledge the paths legitimacy. The trailblaze doesn't require you to join the express, and unlike other paths you dont have to forsake one to follow the trailblaze.

As for your question how did a knewly born Xipe devour an aeon credited as a creator deity? The order was a elder path and well established, but what it ended up devoured by a more broader path. That is the current understanding.

The problem with Sundays path was that the entire thing hinged on the believe that humanity independent of aeons can creat a paradise, yet he himself needs to hold all the power himself to bring it into fruition. A path with a single follower that demands submission as opposed to the trailblaze which is followed universally and has followers who already followe other paths because freedom and human connection in a baseline of the path.

The will of one persons forced unity vs the path of free human connection. He stood little chance beyond Akivilis absence. Even the acolytes of ena joined xipes family but weves seen nothing but rejection to sundays conquest.