I recently built a small web app in React for a special interest group. React, Redux, GraphQL, and all that. Partially to teach myself some new hotness (well, new hotness from three to five years ago). After several days of discovering and trying a lot of libraries, I’m pretty happy with the end result, and it probably is more maintainable, but I realized I could have done the same in jQuery for at most half the amount of time (of course to be fair, the percentage of time that went into the code driving the finished product was pretty low).
Also, I realized that the new hotness to me is already legacy to some. “Redux is the new jQuery”, they say (when talking about Relay or Apollo v2).