I also have the General Journey 12-speed, and have used it to commute etc. for over 30 years as well. Since about 2010 I've had it tuned and serviced every couple of years. The bike shop near me has had no trouble finding replacement parts as needed. It's survived quite a bit of abuse (I ride it up and down curbs, over unpaved areas, and through construction sites regularly). I've thought about replacing it, but there are too many advantages to keeping it. It's smooth riding, climbs decently, and I can still keep up with my buddies on their more expensive machines. I never have to worry about it being stolen, either -- the frame is intimidatingly big enough that almost no one under 6' 4" would want to ride it.