These issues from Shimano are why I am a Campy guy. The stuff lasts forever and they tend to keep formats for much longer than the rest of the industry. I think the free hub spacing has been consistent since the introduction of the 8-speed freehub (though I don’t know about the 12-speed stuff). I have set up 11 speed Campy bikes for my nephew with an old Specialized (not even HED era) TriSpoke and a cheap Shimano Campy conversion hub. That wheel was probably 15 years old, bare minimum.