This shouldn't surprise anyone. But on a bigger scale, obviously Big Boi would like to be doing much more, but it's not like he hates Dre for it. He knows what it is...so y'all shouldn't get too worked up over it.
Dre just never seemed comfortable in the spotlight as he got older. I'm sure he's got millions in the bank, and that's plenty for him.
I actually ran into Dre about a month back and he was real chill and down to earth dude. I was kinda salty on him before that for the same reasons y'all are saying, but after meeting him I felt like an a$$hole for judging him like that. Seemed cool as hell and completely unpretentious.