I'm trying to figure out just what the difference is if you have a 4.5 degree swing angle VS a 3.6 degree swing angle? I mean, sure, Somewhere, someone may have clearance issues on a something, but I want to know WHAT has a 0.9º angle difference where one would work and the other is too tight? add to that - 100 clicks to get ONE thread depth off, how much tome do you HAVE? That's why they invented U joints and extensions out the wazoo... Seems (to me) more gimmick than demand driven.
80 served a need, albeit a small one, over the older 72 click standard... 100 click? Why not just make a slip ratchet, no clicks at all, but it binds positively in one direction and slides in the other. Electronic mag lock handle, where you push a button and it magnetically locks the head in place no matter where, and you release the button and it turns freely.