No one I work with has ever even brought up the possibility of switching from React to Vue, let alone counting Github stars. Compare to when React came out, it was immediate consensus that we need to switch from Backbone to React. When Angular gained popularity, we did not have an urge to switch because it felt unclear what the scope and direction of Angular actually was. React (really JSX) solves the single problem…
This is the crux of the matter. The people who find Vue appealing (myself included) come from the world of design and html+css markup and jQuery. We're not looking to get html into our JavaScript -- rather we're looking to get JavaScript into our html!
There is absolutely no reason to switch from React to Vue if it's working for you (and I don't think anyone in the Vue community would argue with that). But you came from using backbone -- the people who love Vue I think primarily come from using jQuery. We feel the same way about Vue as you do about React, and that's okay! (btw I also use react and also think it's great)
As for staying in React for the rest of your career -- give yourself more credit and hope you'll be around long enough that this isn't true :)