ACH, I can point to Michael Reichmann's review here at LuLa as the reason I started looking at characteristics of old lenses. Aberrations can be a feature and not a problem, in some situations. I know people love their Otus 55 or Sigma Art 50, but it is always good to make the best of what you actually have on hand. If I am hiking with lots of elevation, I start looking at weight, and this is where the old-timers (and pancake lenses) excel.