I purchased one in 2010 that was in relatively nice condition, other than the built-in meter, and have had no problems with the winder. In late 2018, out on a rather cold day, I noticed the shutter release button was slow in popping out after an exposure. Being pleased with the camera, I sent it off to Mark Hama for a CLA, and now all is well, including the meter now works with a non-mercury cell.
The camera has some interlocking to prevent double exposure, and the need to back up the crank a bit to cock the shutter. I suppose it might be possible to wind up in some indeterminate state in that process, especially if any internal linkage is binding. I believe the 124g was last made circa 1982, so the newest of them have been around a long time.
Anyway, I quite enjoy mine.