As a primarly backend dev, I'm very comfortable with React and I don't particularly want to switch to Vue.js. React says me : learn the HTML basics and then deal with abstractions (proof: React Native !). Vue.js says me : deal with HTML templates, everytime, everywhere. Although we even end to deal with HTML in React, I think it's easier for a backend dev with no front experience at all to grasp it. I showed React to a old java dev and he said that React reminded him some java web frameworks like Wicket or JSF. I guess Vue.js would have scared him.