It'd make sense to rename WebDev Arena to React/Tailwind Arena. Its system prompt requires [1] those technologies and the entire tool breaks when requesting vanilla JS or other frameworks. The second-order implications of models competing on this narrow definition of webdev are rather troublesome.
[1] https://blog.lmarena.ai/blog/2025/webdev-arena/#:~:text=PROM...
Don't get me stared on how ugly the HTML becomes when most tags have 20 f*cking classes which could have been two.
In typical production environments tailwind is only around 10kb[1].
[1]: https://v3.tailwindcss.com/docs/optimizing-for-production