This doesn't make sense. You can pin versions and it will work forever. If you want to update you need to update your code.
That’s the point of civilization though. You iterate and what works out, other people copy and iterate even more.
See, that's a beautiful example, just not in the direction that I think you intend it. I can, in fact, take an appliance that's a few decades old and plug it into a modern outlet and it'll work just fine. I do not, in fact, have to preserve an entire electrical grid just to run my application^w appliance, because the underlying infrastructure maintains compatibility.
Which brings you to the larger generalization that you haven’t grasped: the further down the stack you go, the more stable it is. Python is nearest the top layer. Hardware changes in decade cycles. Electricity likely in century cycles. Keep going. The laws of physics change never. Obv the time scales aren’t strictly logarithmic. Human ingenuity means we could find some exceptional electricity specification tomorrow and convert the whole world in one decade. But it is relatively rarer.