Yes, I certainly agree with you there! After I got the M9, my thoughts of rejoining medium format digital disappeared. MF film is still what I like best, but the M9 is so good, so portable, and the lenses are just more usable overall (there are boatloads of them made over 80 years, from 12mm to 135mm and f/0.95 with a bunch of 1.4 lenses in many focal lengths...). I am not saying I would turn down a P65+! Far from it, but the cost/benefit is no longer working for me. I completely understand why people go for them though. They do have resolution, color and dynamic range that is beyond amazing. Resolution is just one component in a final print, and the M9 does everything else so well that you can print huge from it and still maintain amazing quality -- low distortion, edge to edge sharpness and less critical depth of field concerns compared to medium format go a long way in making a nice large print. At the end of the day it is very important to think about what your output is -- what kind of resolution do you actually need. More is not always better, though I will readily admit that it often is!
But sorry to take this thread off track. I did a bit more research, and the 80mm LS is a 6 element 5 group design, while the Xenotar AF is a 7 element 6 group design, so they are different optical designs. But they should have a familial resemblance...