Not to spoil all the fun you'd (personally) have micromanaging all that armor and weapons, in the interest of gameplay, I think maintenance of weapons and armor should be kept to some minimum; enough that it is an element but not enough that it's a huge as you'd have it. Just a balance issue; as realistic as you care to make a game, some things take a back seat to fun, like how you never need to eat or drink (Although you can) or shit or anything like that. Too much realism detracts from the gameplay, or just comes off as stupid (remember the natural hazards in FO1? A few points of damage from tripping or thirst that you'd heal back up in a few hours travel?)