I had a project slated to use this framework. The pilot went fairly well. Fresh has the right ideas on static vs dynamic islands. In the end, we deployed with Astro - which also has similar ideas. In the end, I just wasn't able to get full buy-in on Deno.
That’s a shame, I’ve also been through much the same process.
Astro is pretty good too, though. I’m not 100% sure on some of the decisions it’s made, and personally don’t enjoy the need for new file formats and domain specific languages, but it does a half decent job of being framework-agnostic despite a few pain points.