> choose a single-threaded solution For stateless web requests (solving the C10x problem), this is not inherently bad for most applications. > which blocks th

> choose a single-threaded solution For stateless web requests (solving the C10x problem), this is not inherently bad for most applications. > which blocks the whole app if a single function blocks This is behavior you'll see in many other languages. Management of execution time is very prevalent in lower-level languages. The only languages not susceptible to this problem are high-level, preemption-capable, and possess some form of green threading/scheduler e.g. Erlang/Elixir. IMO, if you need to rely on a scheduler to help ensure that blocking doesn't occur in a disruptive fashion, you're in no position to deride those who "began as a webdevs and knows nothing better." > asynchronous call-back hells This is a matter of taste, opinion, and necessity. I personally hold the opinion that "callback hell" is a symptom of poor design, and properly managed callbacks are not unpleasant to work with (I may be subject to Stockholm Syndrome). Also, try implementing an equivalent non-blocking webserver around an event loop in a lower-level language and let me know what non-callback strategies you come up with for the coalescence of asynchronous events. As an aside, there are hundreds of different ways to improve or eliminate the composition of callbacks in JS: emulated coroutines via generators, C#-style implementations of async/await, promises, the list goes on. > non-functional but GC'ed language Which functional programming languages in common use aren't garbage collected? (again: in common use) Which other common, productive, high-level programming languages (often tasked for C10K web servers) aren't garbage collected? What does "non-functional but GC'ed" actually mean? What does the language's programming paradigm have to do with its memory management model in this context? > I am really too stupid to get it - People are productive and enjoy JavaScript. - Browsers, by and large, only run JavaScript code. - JavaScript on the server-side is a very capable, battle-tested building block for performant web software. - Admittedly: JavaScript is not a great language when compared to other modern programming languages. - Aforementioned opinionated gotchas aren't enough to dissuade communities from using JS.