I think Puerto Rico stands a lot to gain from these changes.
Residents and businesses here file taxes with PR's Hacienda, not the IRS, therefore Section 174 doesn’t affect PR as far as I know. On top of that, PR already has several tax breaks and incentives that may tip the scales even more for some.
It will be a very interesting year though as the head of Hacienda just resigned, so it’s anyone’s guess as to how we’ll end up.