Comment by __d

My experience with retro computers is that things start to fail from around the 10-15 year mark, yes. Some things are still good after 30 years, maybe more, but .. capacitors leak, resistors go out of spec, etc, and that means voltages drift, and soon enough you burn something out.

You can replace known likely culprits preemptively, assuming you can get parts. But dendritic growths aren’t yet a problem for most old stuff because the feature sizes are still large enough. No one really knows what the lifetime of modern 5/4/3nm chips is going to be.