How is the built in testing? I'm a bit wary because Jest is so good and wonder if it can compete on every front it's baking in.
It reminds me of Angular coming with it's own Router, Forms, Animations and then since they're provided officially, alternatives don't get created and then the half of the team leaves and the packages are abandoned.
I know a fella working on a Deno port of Ava (https://github.com/avajs/ava). When that and Koa are ported or compatible, I'll be giving Deno a legitimate go.