Mechanical cameras are like mechanical watches; they have soul. More importantly, they can be serviced and repaired.
There is one camera that is the best of both worlds: the Nikon FM3A and it's probably the zenith of the camera maker's craft.
It has both a mechanical and an electronic shutter. If the electronics or battery fails, you retain 1s-1/4000s and Bulb, losing only metering, AE and long auto-exposure speeds.
And yet, the devaluation will lose you much sleep.