Seriously my biggest pet peeve with both deno and node.js. In every other REPL I've used this is basic functionality. When I talk about this to JS people they look at me like I'm from mars.
Most repls use a special in repl keyword to accomplish this.
For some reason the JS community can't move past "but modules are special". Ocaml has modules too and the repl can reload stuff from a file no problem.
Just wondering that, since Deno is rewriting all of npm anyway, it would have been a great time to revisit some of these historical script-y design decisions, to make JavaScript/TypeScript-at-scale suck less.
Granted, probably too late now, but as-is neither of Deno's url-based imports or sandboxed-by-default changes has seemed worth the migration cost.
But, if they also made something like "everything hot reloads for free" level ergonomic/platform changes, then yeah, I'd be hopping over.