I have received Commodore 64 floppies from a lot of different people, some of which have dates written in the early 80s or late 70s (for the disk not the data o

I have received Commodore 64 floppies from a lot of different people, some of which have dates written in the early 80s or late 70s (for the disk not the data of course). And in every box I've gotten there have only been a couple that haven't worked. Maybe they all just happen to have been stored in optimum ways.. but I fail to see what the big deal is.