Yes, I'm going through this now.
I've had my M2 since 1980 and my M4-P since 1986. These cameras worked for me one once but now they don't seem to. I took them on a trip to Cuba in January and
took some of the worst crap I've ever done (this is saying something). I seem to do better with an SLR, like my F3hp or old F2.
Times change, we change too, I guess.
I'm happier with my beat up old Rolleiflex K4B or my Hasselblad stuff.