I'm having trouble coming up with quick and easy ways to handle weapon durability in my tabletop RPG.

The idea behind it is that I'd like the players' loadouts to constantly be cycling through different weapons, instead of sticking with one that's reliable the whole time.

The issue I'm encountering is that this game as a whole represents my best attempt at streamlining everything I can, so adding more numbers to calculate into the mix of battle would slow it down and work against me instead of enhance the game.

I tried making it so each weapon had a durability score and every night those scores would decrease, and the upside to that was that I didn't have to slow down combat with the durability scores, but it doesn't make sense for unused weapons to lose quality at the same rate of highly used ones.

Any ideas for alternate solutions? Anything helps, just be polite. Thank you!