I don't consider springs wearing out as a magazine going bad. Mag springs are just like recoil springs and need to be periodically replaced.
However, a magazine going bad, like split lips, split welds, cracking baseplates, should be discarded. Especially 1911 magazines, or other single stacks, which should be treated as consumable items.
The only popular pistol where I have not seen their magazines fail is the H&K P-7. Their magazines are built like tanks