>>4281540Electronic film cameras and electronic flashes that were born before you are still working fine and they're probably less reliable (a bunch of plastic gears and motors) than modern mirrorless desu.
>>4281529STA in my experience pocket carrying a fixed lens half frame camera (slightly smaller than an x100v/m43 olympus pen), and having straps on OM SLRs, a canonet ql17, an ae-1, a lightweight minolta 5, a d810, a pentax k1, a sony a7riii with both small and large lenses, and nikon Z bodies, it doesn't really matter and the only miserable experience is having a "small" camera in a jacket pocket any time it's slightly too warm to zip it up.
Camera size has more to do with packing small carry on bags than actually carrying the camera yourself until the point where you have a lens like a 70-200 f2.8. I draw the line after the 24-70/16-35 f2.8 sized zooms. Telephotos just bump into stuff.