Yeah, I understand the rationale. I'm not going to go so far as saying one way is "right" and the other is "wrong", but it still feels for me like taking a big beautiful 1950's V8 automobile, replacing the engine with a contemporary four cylinder engine, replacing the body with a fiberglass one with lots of sparkles in the paint job and replacing the wood and chrome analog console with a computerized, heads-up display.
The number of serviceable Graflexes is self-diminishing. I was very pleasantly surprised when I had the top rangefinder of my Crown cleaned. It works wonderfully now. I'm still working through what might be light-leak (or operator error) issues with my Graphmatics, and I'm giving serious consideration to getting a Speed with a Kalart so I can use barrel lenses, shoot with the focal plane shutter, and adjust the Kalart to use lenses for which no top rangefinder cams are made.
I still wonder, though, at how many owners each of these modified cameras might have had after their current owner -- how many happy decades of use and appreciation might those Graflexes have seen, and how much value those cameras will have in ten or twenty years when the current fashionable mods are neither current nor fashionable.
Sure, I'll bet Charles Dickens might appreciate it if I took a first edition Oliver Twist, cut the spine off, laminated the covers in plastic, spiral-bound it and circulated it amoung thousands of contemporary readers, but that would mean there's one less first edition Oliver Twist in the world, and what in the world is wrong with just getting a contemporary edition for those purposes? For me, the depth of enjoyment out of an Old Original, especially one that's in serviceable condition, cannot be improved by adding bells and whistles.