In that other thread the Cachy team member explained that while the former proton-cachyos is more ‘native’ and may provide a small performance boost - I quote “single digit percent if any at all” - it is also noticeably less stable for a non-negligible number of setups.
They also suggest you may try both and make your own decision.
But that was the reason for the change of default.
Oh you got it. Well. Its fine its repeated here anyways. 