Why not? I'd like to see some old friend, just not ones this old.

I just don't like the idea seeing people again, after seeing them enough in a previous game. There's nobody in the entire wasteland that I like enough to want to see them in the next game. I think it would be just a stupid gimmicky thing, "Oh.. hey, there's that woman, wow she's
still alive... huh"..
The only person it would even make some sense as to why they are in NV, is Uncle Leo because all he does is walk across the wasteland. And he's a Super Mutant so probably the only person capable of actually getting there.
Like, if I went oversees on holidays, I wouldn't want to see someone I went to school with there.