Lindy effect (https://en.m.wikipedia.org/wiki/Lindy_effect https://en.m.wikipedia.org/wiki/Lindy_effect) says that the best predictor for software longevity is

Lindy effect (https://en.m.wikipedia.org/wiki/Lindy_effect https://en.m.wikipedia.org/wiki/Lindy_effect) says that the best predictor for software longevity is how long has it been relevant already. So, React seems like what you want. It's considered "old" technology by the hype people, but I don't think you care since you said you're using Rails.