I have a strong tendency to hoard while saving the "best" for later. However, with cartridges and vinyl that rather defeats the purpose of having them in the first place. So in fact my best cartridge (Blue Lace) on my best arm (FR64S) gets the most play time. On the 2nd arm I rotate though many other MC cartridges, where no one cartridge (including other Koetsus) has emerged as a definitive #2. I keep looking for that other cart which will match the Blue Lace’s enjoyability factor - and that certainly is possible in the short term (a sonic flavor change is always refreshing) - but getting this to stick in the long run remains elusive.
That said if you have OOP / NOS cartridges in your collection, that would certainly increase the instinct to "save it for later".
* I don’t do "casual" listening here. ~ 4 - 7 hours of "focused" listening per week, which greatly reduces the burden on my best cart.