In my experience, it seems to be happening more often now. It used to be I had to give them something new, but now they seem to loot goodies themselves. I've seen NPCs stoop and apparently loot corpses, too.
Many followers love them some staff magic. The first time one of them started using a staff, I thought there was a rogue mage behind us. Nope, just Aela. They will switch them out as needed, too. Aela in particular knows when to use a firebolt-type staff. At one point she had three or four staves, but she didn't seem interested in the fire types. She'd use frost and lightning till they ran out. That is, until we came across a troll. Then out comes the firepower! I half expected her to say, "That done blowed him up real good!"

At one time she had a sword or axe with paralysis on it. She would not equip her shield, even in melee combat. Instead she'd use a flames staff, you know the type that kind of works like a torch? She seemed to have a ball in Nord dungeons against draugr. She'd knock them down with the axe then, with them helplessly paralyzed, would play the flame over them, taunting them all the while.
