no man its nothing to do with that,interlagos is not the best neighborhood but isn't bad at all i been there multiple times,they have a very good structure,its like every time i go there i am thrill,i love the energy there,i love that place.I love Interlagos. If I understand well, they move to Rio because the track is in a rough neighbourhood in Sao Paulo?
How about they fix the neighbourhood in Sao Paulo instead? I would bet it would be less expensive to do that than to build a brand new track.