[m0meni]

Don't think it's necessarily the most appropriate lang, but it significantly lowers barrier to entry. One could also always use a compile-to-js lang if they want more safety e.g. TypeScript, Reason, ScalaJS, Kotlin, PureScript, etc.

[nine_k]

If you can pick a language which is not JS, there's little point in carrying around such a resource-intensive runtime as JS requires. Consider compiling to LLVM and have a runtime statically adjusted to only carry what's actually used.

[bdcravens]

Aren't there cases where low barrier to entry is a liability, not an asset?