As per usual with the lack of meaning of "passing time" it doesn't affect much the game, except if you have him in te party and dies in the middle of a battle, in that case his corpse will start emanating necrotic aura (it took few battles to me to understand why my party had died even when winning the battle).
I don't know if he at some point decides to leave the camp.
[I don't have issues giving him artifacts, other blue items can give more interesting and useful skills, the one artifact I find difficult to give him is the longsword of the "Tyr follower"].
