I agree with the "prefer 50's on a RF" dunno why. M42 SLR it's usually the 2/85 J9 for portraits, love that lens. Or it's the Zeiss Jena 2.4/35. The ZJ 50/1.8 Pancolar sees little action for whatever reason, though there's nothing wrong with that lens.
Actually, actually I really like the 45mm lenses, a somewhat odd focal length in SLR-land that's a smidgen wider than a 50 but still in the standard focal-length territory. This is why I'm in the fixed lens "Yashica camp". The Lynx 14e gives you a very good fast 7element/5 group 45mm 1.4 lens, full manual control, and a reasonably accurate built-in light meter, and parrallax-corrected viewfinder whose framelines are designed around a single focal length. As good a lens as the 1.4's found on interchangeable lens cameras? Dunno. To me a double gauss 7/5 lens is a double gauss 7/5 lens. Same optical formula, so the interchangeable lens "system" cameras tout more esoteric stuff like "superduperyduper multi-coated", "superiour quantum contrast", "Sigma 6010 quality standards"... My fully CLA'd Lynx 14e sample cost $42.39 not including shipping. What's any 50/1.4 Leica, CV, ZI, 'tax G1-2 running these days? Are these lenses really that much better than the ones found on the yard sale cameras that have basically the same optical formula?
Similary a GSN gives you a great 1.8/45mm plus some cool/useful low-light features and aperture priority.
It's not that I'm cheap (well, actually I am pretty cheap) but to my way of thinking, why spring for a pricey "system" camera with interchangeable lenses when I know that 90% of the time I'm going to use a standard 50? Also, I prefer leaf shutters to cloth or "venetian blind" shutters for their quiteness and (overlooked and underrated) fill flash capabilities.