Except that it's more complicated than that. Obviously, an Ice Box never breaks. So, by your metric, that would make an Ice Box the ultimate refrigerator. But, it's not. Because an Ice Box comes with its own problems - it's messy, mold, small, needs to have ice delivery, etc. An older refrigerator may last longer, but, it also uses FAR more electricity, is far noisier, MUCH heavier, and lacks many of the features that a new refrigerator will have. For example, the mess of an old refrigerator in that it needs to be manually defrosted regularly, potentially resulting in water damage to your floors. Your old refrigerator will likely be much, much smaller, and the freezer compartment will be much smaller, requiring the family to purchase a second freezer chest, which adds to the electrical bill.
See, because that refrigerator you bought in the 1970's for about 500 dollars is the equivalent of 4 THOUSAND dollars today. For 4 grand, I can buy three pretty decent refrigerators that are going to last me 15 years or so each.
So, sure, that fridge may have been a one time purchase. But, it wasn't a better refrigerator. In virtually every measurable metric it performs worse than a new refrigerator. And, given that the electrical costs of an old refrigerator will be astronomically higher than a new one, overall, the new refrigerator, because it is cheaper, will actually be more economical over time.
Which rolls us back around to game design. See, this is exactly the same issue we see in game design. "Oh, but this old rule works just fine, we don't need to change anything" ignores the fact that over time, innovations in game design results in better play experience. There's a reason that OSR games don't actually retain a lot of the older mechanics. They either strip out a lot of those older mechanics, or they overhaul them. Because, believe it or not, we actually manage to learn a thing or two about how games are played over the decades and it's possible to apply that experience to game design.