Some do support it. Some don't. In talking with folks down there, I get the impression that they would like to be their own country.
Not sure how they would fund that effort.
Old San Juan is very nice. The rest of it, not so much. There are pockets of nice, for sure.
One of my friends has 3 houses there, all in nice areas. His mother lives there still, as does his sister, who is an immigration judge. She's pretty damn cool.