The lack of single-file components is one of several reasons I wouldn't reach for React prior to the LLM craze[0]. For personal projects, I love Svelte. You wouldn't need tailwind there for the reasons proposed given their support for it.

[0] Things have probably changed, but Svelte 5 was a litmus test for how recent the data cutoff was for an LLM model. Meanwhile React _especially_ has no reason to change how the framework is used by coders. Thus there's years of scraped tutorials and sites for how to throttle a function or what-have-you in React.