MM are really nice, and the solid rosewood necks are simply stunning. Build quality is better than any bolt-neck builder out there I think, but they are not really doing the kind of thing PRS is. I also am not the buyer for either of them if we're being perfectly honest.
I'd say yeah, what he is doing is a step beyond what other manufacturers are doing, even with something as simple as that neck join. If you pull the neck pickup out of a PRS you will see what I mean. I get if the guitars don't check your boxes, TBH they don't really mine, but I really think what PRS is doing as far as build quality is a notch better than other makers. They are, simply put, the most stable guitars I have owned - they never need adjustment, never go out of tune, never feel different when you pick them up. That alone is a feat.
Anyway, this is all opinion and based on my own somewhat limited sample size, and as with everything it is partly subjective and your experience and opinions are likely to differ.
But at the end of the day, I am a Gibson player and I accept them the way they are. Some people think I am nuts for that, when I could have a nice PRS or MM or something else instead, but the Gibsons feel they way I want and more importantly make the sounds I want so with them I stay.