Look; we shall all have to face it. Nothing lasts for ever.
- Put it away in a box and never use it;
The capicitors will die. So will all the transistors.
Plastic housed components are not perfectly air tight. Through time even the silicon will simply rust away.
- Keep using it and have fun;
If not already happened the machine will yellow and die because of wear.
Since the second option is most fun I would keep on using them machines while they are still around. At least you can still have some fun while the machine takes it's inevitable path to destruction.
And when there are no more around? That won't be anytime soon. But when the time comes you can use the , by then perfect, emulator or find yourself a new hobby. There is so much more to do