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@robpike I have three telescopes, built in 1985, 2001, and 2018. All work fine, though there's a rubber bearing in the focuser of the 1985 scope that needs to be cleaned a bit. It helps that precisely shaped glass doesn't rot, crash, require updates, throw up random paywalls, or eat all your CPU cycles if you look at it funny.

(If we're talking specifically about computer/network tech, my almost 3 y.o. M1 Mac Mini pretty much just works as intended, albeit with the usual Apple quirky bits.)