My elder son (13.5) has never been abroad. In fact, he's never been on holiday as such - but loads of interesting day trips. My dad's semi retired now (a classicist) and is looking into taking him to Pompeii this Summer - just him and my dad, no one else can afford it.
I don't think he's deprived. He seems to have had a lot of nice treats and experiences. I don't really get the holiday angst. (DS2 is only one and a half, and seems happy to pootle around the countryside looking at sheep :) )
I haven't been abroad since I was 17 - I'm 36 now. I feel OK and not deprived.