Sounds awesome but I wouldn't look at something like this (which is awesome btw) unless I was expecting it be under massive sustained load.

For everything else I'd just use Python or PHP as they are mostly fast enough.

I am planning to write a framework in Rust when I have the time though as I find it an interesting language and as a web dev it's my area, I'll definitely be looking at how you approached stuff ;).

Cool, it would be an interesting design to see something with polling and perhaps different gears for lower load levels. BTW, the system with polling architecture that I mentioned I worked on is still in production and selling well(I hear).