One of my favorite was when I spent years starting to learn photojournalism on the side: the mechanics of using a camera is only a small part of it (it's mostly about understanding and conveying a story), but even at my student/amateur level, the muscle memory with pro DSLR and lenses was crazy-effective.
I even got a shot that happened only in an instant, unexpected, perceived in my peripheral vision, and the right camera body (I had 2 hanging from shoulders) was suddenly in my hands, viewfinder to my eye, aimed, zoomed in with my 70-200 focal length ring, focused (I might've even used the wheel to select which AF focus point, before half-pressing the shutter button), and snapped-- without consciously intending to do any of those things, so it all seemed to be instantaneous, and I got the shot of something as it was falling.
Had I only had a touchscreen phone/camera or a bottom-end DSLR (on which some brands intentionally cripple the UI, to avoid cannibalizing pro gear sales), I would've looked very dumb as I didn't get the shot.