Unless you are talking about rust it is really about hours of operation. I deal with a lot of stuff that runs 24 hours a day 7 days a week for decades. Some just completely disintegrates, other shit just keeps going. It is all about what it is designed for. However Japanese shit from the 90s tends to be designed and built like the latter.It blew and suddenly didn't. With the loudest steel cracking sound I've ever heard. Pretty impressive what broke actually.
It's 830pm and I just finished the driveway I agreed to do if I fixed another neighbor's blower which had a lesser problem, plus the 3ft berm in all the above.
It's amazing what bearings and driveshafts installed in 1997 look like in 2022
I have an old microwave I bought used for $5 in 1998. I have been actively trying to kill it by solely cleaning it with bleach and a pressure washer for over a decade, it will not die. It started making funny noises at one point but it was just s loose screw on the sheet metal cover. Out of pure respect I can't bring myself to get rid of it.