I'm always excited to see new OS concepts. It's a shame that there's such a huge amount of work involved in building operating systems, otherwise we might have a lot more options to choose from. Back in the 80s you wrote an OS that supported one or two types of fully integrated computers. Now you're supporting any combination of hardware, much of it requiring proprietary black box drivers that depend on a specific ABI anyway. It's why I don't buy into the idea that people who wrote software in the 80s were ultra low-level wizards or something. They had a significantly easier job and could specialise.
The expectations are just so absurdly high now, it's the same problem in the browser space (which at this point is there a difference between OS and browser).
There isn't a lack of attempts though, there are many tiny OS out in the wild (believe there are like a dozen alone written in Rust) to play around with but many have had to dial back their ambition purely based on hardware support alone.
