That's like saying that C++ is a better backend platform than the JVM due to better performance. For 95% of business web apps out there it doesn't matter, I mean, multiple business with evaluations in the billions of dollars have been created with runtimes 50x slower than nodejs.

Nodejs competes with Java in single threaded performance, I'll say normal JS code is faster than normal Java code. For web services that are IO bound, nodejs still competes with Java unless you go with all the batshit crazy complex reactive stuff in the Java world, supposedly is going to get better with the new green threads implementation.

You may have missed the other 10 reasons I listed besides performance.

Also, no JS code will be faster than Java. While both have insanely good JIT compilers that can output some truly, often surprisingly great machine code, java is all-around faster, if for no other reason, due to its killer GCs.

>That's like saying that C++ is a better backend platform

C++ isn't even a platform, period. It provides no runtime or anything else other than the language. If you build on top of the JVM ecosystem, similar to NET you get a cross platform, extremely performant ecosystem with millions if not billions invested into it basically for free.

And of course you can build a billion dollar company on a crappy tech stack, but if you had built it on a good one you'd still be a billion dollar company and be even better off. What a strange argument, you ought to make the best technical choice you can, it's a core part of anything you built. And getting a 10x performance on the JVM vs say Python, or smooth, non error prone concurrency in Clojure is a significant benefit.

In particular in business applications were you usually deal with data transformations, the single-threaded, mutable state type of design of some languages is awful. Clojure in particular was exactly made for this practical use case.