Professionals are going to use the latest and greatest tools at their disposal, aren't they? For web developers, that seems to be esoteric frameworks (React, Vue, Svelte, Webpack, Babel, etc. etc. etc. whatever the cool kids are using these days)
Compared to non-professionals who stick with tried-and-true glue (vanilla js, html, php, python, etc.)
It would be like if Jenkins got a sponsorship, so they hire professionals who rewrite the entire thing in Rust because it's the best suited for the job by the professionals' reckoning. Never mind that barely anyone knows Rust compared to Java.