React and Docker are both almost a decade old (both released in 2013). TypeScript is from 2012. Functional programming is very, very far from being a modern concept even if it's (maybe, finally?) getting a bit more attention.
So react's existed for almost half the time you've been using php. I think yhr distinction here is between tech that's new, and tech that's new for you
Yeah, each of that requires extra cli/config/setup instead of just `import` libs. It's not about old or new, it's simple vs unnecessary deps (imply complexity).
They are using React, Tailwind, Typescript, Docker, FP etc. which is what you would find in many modern tech stacks.
That's what I love about this "we should only use old tech" argument. There is no specifics, justification or technical basis for any of it.
So you end up wondering how old should my choices be in order to satisfy the crowd.