I've been told that back when most Apple portables had optical drives, that was the number one most often replaced part at the Genius bar, or at least it was after they went full-scale to slot loading drives(all G4 portables and anything after that). If you never carry your laptop or always keep it in a clean sleeve, they tend to fare well, but the slot loading drives are just junk magnets if they're tossed in a backpack or other place like a lot of people carry their laptop. When I put the Optibay in my 9,1, I used aluminum duct tape to seal off the slot from the back to not give dust another entry point into the case.
Somewhere or another, I have a box full of slot loading drives pulled from all manner of Macs from Powerbooks to iMacs to to iBooks and everything else. The only ones I don't lump in with everything else are the ones I've pulled from dead iMac G3s because they're the same(oddball) drive that the G4 Cube uses. In any case, a surprising number of the ones pulled from portables you'll find with a coin stuck in the bottom of the drive below the spindle. I've never actually seen it hurt the function of the drive, but they get in there from-surprise-coins falling through the slot.
I have a few of the Apple branded external SuperDrives kicking around that I use when I need one. They still work fine even with my M1 MBP. I keep one plugged into each of the docks at home and work, and have one or two others around. You have to do a bit of terminal work to get computers like my MBP 9,1 that are supposed to have an internal drive to work properly with the Apple external, but once there they work just as well as the internals but I have better control over their conditions.