I have found that the individual camera design in question matters more than whether or not it is of mechanical or electronic design. I've had troublesome cameras and completely trouble-free cameras of all types. For instance, nothing but trouble with Canon FD cameras (though they are probably my favorite cameras to use when they are working), but no trouble at all from Nikon Fs. Trouble with an AE-1 and Minolta electronic cameras, but no trouble from my Nikon electronic camera. Trouble with my Leica IIIc (1950's), but no trouble with my Leica IIIa (1930's). The history of the individual camera in question is also very important IMO.
I also don't assign any special magic properties to mechanical cameras. But I do prefer the way they are designed and feel in the hand, for the most part.