Cloudflare Workers + Durable Objects. I used to like mucking around with Linux and distributed databases, but then Cloudflare came and destroyed all my motivation, since their platform is better than what I could come up in a decade. So just send me the bill and let me build brilliant, beautiful software effortlessly you bastards. Working harder than you should is a waste of time and money, you have to learn to sit pretty on the gravy train.

What's the local development story with CF workers and durable objects?

I mostly care about the ability to test locally (both automated and manual tests), and how composable everything is (fast tests too)?

It's a simulator, works like a charm. The next version is going to be based on workerd, the actual Cloudflare runtime which they recently open-sourced.