Yeah, I've tinkered with it when it first rolled out. The dev experience and performance left a lot to be desired. Poor visibility on the status of containers, weird phantom bugs, having to learn new platform idiosyncrasies. Just embrace k8s. Just roll it up into a wrapper that runs on GCP or whatever under the hood that would allow people that need more control over the infra to adopt the platform.
I agree there's a lot of room for improvement, but it's definitely worth keeping an eye on; the experience of Workers now vs when I started using them 2ish years ago is massively improved. They definitely like to ship their MVPs, but CF is pretty good about actually improving them IME.
It's very much still maturing as an offering. But it does exist!