I've had games ranging from the 60s to the 2000's. The thing is if it is an older used pin, it needs to be completely gone thru and replace all worn parts, clean and adjust the switches (especially in an EM), fix troublesome connectors etc. Not just cleaning the playfield, new rubbers and fixing only what doesn't work at the present moment. I very seldom have to fix anything on my games 'cept for normal upkeep of the playfield once that is done especially if it is played in a home environment. EMs especially are incredibly reliable in the home if you 'do 'em right' to begin with.
Hell I didn't even know newer games didn't have removeable lamps or leds, I'm a real dinosaur! But that doesn't seem like a big deal to me if they seldom burn out and I assume they aren't that difficult to fix if they did (?)