My partner is from Hawaii and he uses lots of pineapple.
He uses it in all kinds of pork smokes, some Chicken too.
I've never had it in Beef, just in Butts and Hams.
Kind of an Islander taste. Different, but good.
I second the idea of mixing Pineapple, Coconut milk, and '151'. Very good.
(Ya gotta do something while the meat's smoking)