The motor on my bike is almost 57 years old, and in many ways it's working better now than it ever has.
Seriously, in the case of bike components, "obsolete" doesn't have to mean unusable, or even of sub-par performance, unless there's something you just don't like about them, like down-tube shifters or something. Yes, the new crop of components seems, in my limited experience, to be equal-or-better quality at a given price point when compared to the old stuff, but that doesn't mean the old stuff doesn't still work well (assuming it worked well when it was new).