>>4483648literally nothing
"reliability" only if you shoot in extreme conditions, and still a lot of 70's cameras are in a shit shape and CLA
I recently got Nikon F801s as a spare body and I just completely switched from my FE. This thing has so much bigger and brighter viewfinder. It is slightly heavier but has good grip and is sturdy, has matrix metering, 1/8000s and other bells and whistles and you can get it for half the price of FE or FM and quarter price of FE2/FM2.