I inherited a Pen FT from my father, and then bought another FT and an FV... and have 20, 25, 38, 40 and 50-90mm lenses. Back in the 60's I had a Petri Half-7 and later a Pen D2, so my darkroom was set up for printing this size neg.
It's been a pain getting (color) processing and scanning from my local pro lab, which uses Agfa machinery. They always double-up the prints and scans, usually cropping destructively to fit. The do fine with the very similar APS size images; it's just that there the 35 half-frame has become the forgotten format. And they can't do 6x9cm either; 6x7 is the limit!
Well, I clearly need to find a good Fuji lab nearby... thanks for that tip!