Svelte will never have JSX, not natively anyway. It's completely against the philosophy.

Not all of us think JSX is a great thing. The "templating" language in Svelte isn't really a templating language at all, it's just Javascript with some (unavoidable) helpers. It takes about 2 minutes to learn since there are really only maybe 5 helpers.

Svelte templates aren't really a new language, it's just HTML where you can sprinkle in some curly braces to insert variables or js code.

You can dev Svelte in TSX with svelte-draft