I really hope no one is upset at this point by that sort of thing.

For any Commodore, Apple, Atari, these computers sold in the zillions; there are plenty of decaying originals. They rot over time; if you want to keep using them, you have to replace the power supply; recap the motherboard; the case will generally have yellowed and if you want it to not look nasty you have to do something about it -- retrobrite, paint, total replacement. It's always going to trend to a ship of theseus situation unless you want to encase it in an unlit vacuum forever as an object to occasionally think about but not interact with. And if you want to use it and you have to make changes anyway, why not make it more pleasant to live with?