Oh, sure. Under this very tag I could mention that using JS outside a browser, especially on the apps that by its nature should be a tiny layer on top of an OS's services is an idea with, ironically, related to another great one - Desktop Java Apps, and both of there great ideas are somehow appear as an reflection of one another in a grotesque mirror. They never works as expected.)

There is no justification of using any VM for an (cache-able) I/O bound apps. Why do they need nginx as a front-end if NodeJs so great?)

Could the whole engine be implemented as a few nginx's modules using another ready modules?)

Oh, sorry, I forgot to close the tag.