I have a caches that get found once or twice a year (if that) but I visit them regularly. They're in some nice spots and on some nice rides, I don't archive them because I know they're still there and in good shape.
I also have a cache "the wandering orca" that went missing with a DNF and so I disabled it. It was disabled for a while (6 months I think???) I didn't get out to fix it due to a lack of transportation, but soon after new wheels were aquired I went up to replace it. I had intention to replace so I didn't think archiving was an option.
Then I've had caches that I thought were a good idea when I placed them, but after having them exist for a while better judgement told me to not have them, so I archived those ones.
Once the game is over, the king and the pawn go back in the same box.