I was there, a couple of weeks back.
Actually, we'd booked a cruise last March, and it was too much of a PITA to change it.
We went to San Juan on 11/6. The van driver from the airport to the ship now had a 2.5 hour commute, as the roads from his home to the job mostly weren't there. He also had no water, or electricity. The airport was normal, but the view on Final approach was a lot of blue tarps.
About half the stores were on generator, some portables, some trailer-mounted. Everyone was trying to get back to business. In Old San Juan, the older buildings were pretty much intact. On the drive from the airport, there was a lot of damage. I'm sure that part of it was that the old buildings, that would have not survived, were blown away long ago. There were a couple huuuge trees that the storms took out.
We hit several other islands, some more stomped, some dodged the bullet. In St Croix, there was an older Carnival ship, tied up, acting as a floating hotel for FEMA. They got it bad. In fact, we were not supposed to stop there, but they opened up at the last minute, and we docked there. No excursions, but the water and sand was still there. Only down side, was as I was getting my money's worth of UV, one of my kids asked, "Are you going for the 'corpse look' or 'whale on the beach'?" Little snot. I taught him well
My take: when you get a bit away from the touristy areas, the people mostly have not much. The good of that is that it's easy to get back to where you were; the bad is that it was not much above nothing. On most of the islands, concrete block is the basic house material, because hurricanes.
Interesting trip.