I'm not saying that this is a "bad" thing, but the last time I did any significant amount of frontend stuff was back in ~2014, and it was AngularJS, which was considered pretty ok at the time I think. I left that job and started doing almost exclusively backend stuff for several years, and when I looked back, the entire world had switched to React and transpiling JSX and a lot more CSS than I was familiar with.

It seemed pretty intimidating to try and pick that up again, so I never really left the backend stuff, and now I've managed to even avoid web stuff for awhile, because I kind of hate web programming.