Bluefin looks super interesting! But I'm personally on a "less cloud everywhere" kick. I'm running OpenBSD as a hobby machine because I want to get better at real UNIX administration, which seems like a lost art. So my gut feeling looking at bluefin is that separating the OS layer and the dev layer gets me farther away from bare metal, not closer, which is not what I want right now. But I'm totally open to the idea that it could offer a better experience, it's just that getting farther away from the core OS is not what I'm looking for right now.

That's why I really appreciate what DHH is doing both for desktop Linux and with Linux server deployment. I think there's a pretty comprehensive worldview in advocating for both of those technologies. Not sure if that makes me a cult member or what