The population does appear to have stabilized in 2019, but that's not because Puerto Rico is back to being a carefree paradise. It wasn't until that March that everyone was back on the power grid, and the reconstruction was a patchwork job that produced regular blackouts. One outage that hit 100,000 people was caused by an errant iguana. Some people have converted to solar power out of sheer distrust of government power and/or the nefarious iguana agenda, and some Puerto Ricans are also turning to local start-ups to handle insurance after 13,600 post-Maria claims were left unresolved for more than a year.
We don't want to make it sound like an apocalypse. Life goes on, and a lot of people are working hard to improve the state of affairs. But there are some people who still haven't been able to rebuild their homes, thanks to the majority of disaster relief funding continuing to be held up in Congress (a little bit of it also got embezzled, for good measure). While they can't vote in presidential elections (man, isn't it weird that America still has colonies?), maybe don't be surprised when Puerto Ricans try to make the handling of Maria an issue in 2020.