I wonder - before our cameras had a way to show total shutter actuations, I never,ever thought about how many times I could trip the shutter. Never considered there could be a cap to my cameras life. If there were a way to count shutter actuations on my M4, would it be comparable to the numbers you'd get out of a digital M? I mean, since there is a film budget, I would imagine that there would be fewer frames spent, versus a digital camera where people can sometimes over shoot (hence 2 and 3 year old cameras with tens of thousands of frames shot).
In all my years of shooting film bodies, I only had one shutter failure, my Nikon FM2 - which had high speed titanium blades. It was not covered by Nikon warrenty for some reason. Bummed me out as a 15 year old kid.