Originally Posted by
rubiksoval
Well, no, it's not. Parts don't last decades unless those decades are spent riding 100 miles a year.
I haven't had 105 parts make it past the 15,000 mile mark, myself, whereas I've had multiple groups of Ultegra (shifters and derailleurs) go well into the upper 20s.
So aside from your hyperbole, I guess your post regresses to the point of your anecdote differing from mine. Neat.
To add an anecdote, my 105 has 21,509 miles since I started recording, with a few thousand miles earlier. I've replaced chains, cassettes, cables and probably prematurely, one chain ring. At a rate of more than 100 miles a year, though less than many BFers. I don't see any indications that this same 105 won't keep working for another 20,000+ miles.