What I always wonder about is how one can write "non-trivial" stuff using CloudFlare workers. Don't get me wrong, I am more than intrigued by the concept, but as far as I understand, it cannot do things like connecting to a database or third party service. That makes the types of problems you can solve with it relatively small.

This is confirmed what I see if I look at the Cloudflare marketplace: it has apps for things such as cookie banners and automated GA integration, but that's not that interesting.

What's the long-term vision for this?