Yeah, I still get use out of XMLHttpRequest to this day good thing I got in early and variable hoisting isn't gonna get me! /s

A lot of snark aside there's a bit of a false dichotomy (I think) here at work. Whenever or wherever your jumping in point is into $something it will always pay dividends to learn the fundamentals of that $something well and unless you interact with older iterations on that $something then you'll never have to bother learning the equivalent of Grunt, Gulp, Stylus, Nunjuncks and so on for that $something.

With that being said it's also good to put aside time once a year to check out a good recommended (and usually paid) course from an established professional aimed at busy professionals.

As for LLMs I feel it's slowly becoming a thing big enough where people will have to consider where to focus their energy starting with 2027. Kinda like some people branched from web development into backend, frontend and UI/UX a good while back. Do you want to get good at using Claude Code or do you want to integrate gen AI features at work for coworkers to use or customers/users? It's still early days just like when NodeJS started gaining a lot of traction and people were making fun of leftpad.