Hi MJ -
It seems most (all?) of your discs are Z plastic, which seems to last forever. I'm wondering how often you put new discs of the same mold in your bag? Is it just to change things up or for a specific flight that isn't happening anymore?
It all depends on the type of disc it is. When it comes to my high speed drivers, like cranks, I replace or put another in the bag every few weeks to a month or so. Things like the mantis which I use a lot, end up being in the bag for a few months or so. My mids can stay in the bag a while, but it all really just depends on how much I am playing