[Pfhreak]

> none of these features are unique to the web.

The web has all of them, I have yet to find another platform/language that meets all the same criteria.

Combine all of the above with a rich toolchain and extreme dev tools portability -- I can be up and running on basically any machine in minutes. As well as ease of deployment (at least for hobby projects).

All of those other platforms are, for me, less in one of the axes I care about. I've developed extensively in Python, C#, and Java for both personal and professional projects and while I like developing in them for many, many reasons, when I need to start a new project I nearly always find myself reaching for Javascript as the starting point.