> A generic example, fridges could easily last 40 to 50 years without maintenance. They wouldn't be all that more expensive either. Volvo, and the B-52 bomber program showed this, with Volvo having some models unchanged for 20 years. The B-52 has been in service longer than most people have been alive.

Neither Volvos (presumably, a reference to their cars) nor B-52s are maintenance-free, even if they have long service lives with proper maintenance, so I don’t see how either supports your argument that fridges could easily be made to last decades without maintenance.