My 25-35 year old Pentax equipment and lenses still work fine. I have some 80+ year old roll film cameras that still work. One way I have saved money over the years, especially in large and medium format, was to buy used and often old equipment. Much of the stuff I have owned has been as old or older than I am. And it all worked fine. I could do most minor repairs and adjustments myself. Will my new m43 equipment work 10 years from now, much less 20, due to the complexity of electronics and autofocus? Do we need 1/10th of the stuff they put into cameras nowadays? Just thinking.