Originally Posted by HillRider
Not in my experience. I've had and seen numerous UN72/73 bottom brackets in service for well over 30,000 miles and still be in good condition when they were replaced as part of a crank upgrade. Shimano sealed cartridge bottom brackets are one of bicycling's real bargains for both cost and durability.
Me too and I'm a retro grouch. Sometimes even I have to admit that some of the newer ideas really are better. However, I don't like to do that for at least a decade or until I can judge their longivity. Cartridge bottom brackets definitely make the grade.