Yes.
They don’t exactly age, but top of line chips have very large currents in very small conductors. When you do that with DC current, your conductors deform with time, up to the point that they stop working correctly.
That said, you probably can get plenty of casual use out of them.
Components from hardware stores have all kinds of composition. If you don’t know what it’s made from, why would you assume it’s safe?
Even “stainless steel” can have all kinds of different compositions, some highly allergenic, some out-right toxic.