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Too much network and filesystem data moves through an OS before the user application can work with it. As data bandwidth increases, this becomes a bottleneck. It would be great if an OS could push this out to userspace and focus on zero-copy stacks for network and disk.

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3L does do this. You can share as much data between the OS and user applications as you want. The OS doesn't really mediate anything so there is no overhead from copying data or messages between processes or enforcing some security mechanism. The language runtime enforces the references that are available to some code that gets run but that's it and that's all that is needed. You really don't need a separate OS program facilitating everything to serve as an OS.

Thanks, I looked through the 3L website and features section but didn't realize that from there.

Yeah sorry my fault really. I'm working on improving the organization of the site and I haven't had near enough time to write everything down in an intelligible fashion. Most things are still in my notes or waiting to be extracted from various papers.

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