I think other than being kitchy, the part I love the most is NO FRAMEWORK: plain js. No pre/mid/post/art-deco processor that turns 4 hours of work into 40 hours.
I've been developing some games and frontend on my free time for fun. I've been using typescript and Pixi.js but other than that nothing else. As a backend engineer, I've always thought about learning a frontend framework but I've never actually had a strong need of it.
So question if you're a frontend engineer: Should I? I never felt the need of a framework despite I render quite a bit of dom elements. Do I have a need that I just don't know right now?
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.)
If you have a multiple team-members and you need to get everyone using a common approach, frameworks can be useful. If you need to do small unit's of work and need to leverage boilerplate functions, frameworks can be useful.
The issue I see today is many of these frameworks started as ways to build efficiency; they have degraded into disciplines that require exorbitant investment without corresponding business value.