If you want to get a job as a frontend engineer, you should learn React because it's a tick-box on a lot of job postings these days. If you just want to make p

If you want to get a job as a frontend engineer, you should learn React because it's a tick-box on a lot of job postings these days. If you just want to make personal projects, it depends a lot on what kinds of projects you want to make. React won't really help you with the sort of 2D-game-type programming you're using Pixi.js for. On the other hand, if you think the Reddit redesign is really good and you want to make a website that works exactly like that, the React community is a good place to start. But one of the main benefits of using React that I've heard about is that it forces all the members of a development team to organize (certain parts of) their code the same way. This isn't really an issue on personal projects. Personally, I spent about a year working with React for a job, but I continue to write vanilla JavaScript on my own time. (You can learn other frameworks than React, but React is a good starting point because it's the most popular one. Then you can learn about Framework X by reading "how is Framework X different from React" articles online.)