I just rebuilt a web app in Vue (and Vite), and first-class Single File Components are the dream. Is there anything that even approaches that simply joyful DX?

Rebuilt with that but coming from which stack?

Just POJS/Vanilla JS with jQuery. I've had good experiences with earlier versions of Vue for other projects, so surely there's some familiarity bias there. I now see that Svelte has SFCs and that Vite supports Svelte, so I might give that a try for my next project.

Your tolerance for JSX is too high.