I think you missed the point. Canon started the "hey, look, it's electronic, no aperture ring!" deal, and others copied that fashion. I think most people regret it, and if anyone were starting a new high end mount now there would be an aperture ring.
I don't think there are many people who still wish we were still using mechanical aperture rings! Certainly not at the expense of being able to do it electronically by other means. Secondly, there
have been new high end mounts introduced since Canon came out with EOS, and they don't have aperture rings. Just take a look at the Leica S2. Or Hasselblad's H3D. Or the Mamiya/Phase One MF system. NONE of which have aperture rings. So what were you saying about "if anyone were starting a new high end mount now there would be an aperture ring"?
Plus, I think if "most people" really did regret not having aperture rings, the manufacturers would have heard about it by now, and they would be offering aperture rings on their lenses. Heck, if you look at the Phase One medium format lens below (third image below), there looks like there's a narrow aperture ring near the lens mount, but they've instead decided to use it as an AF/MF switch ring! LOL. I guess they did that just to tease you, Louis!
And on the lower end of the scale, we've had the new Olympus 4/3 mount, Olympus m4/3 mount, Sony NEX mount, and Nikon 1 mount, all of which don't have aperture rings either. Plus, with Pentax's medium format digital system, even though it's still compatible with its older 645 lenses, they chose not to give the newer AF lenses aperture rings either. So clearly, there have been
plenty of opportunities for multiple manufacturers to go back to using aperture rings. And each time, they've opted not to do so.