Erlang and Elixir aren't as popular as other modern languages because they don't have a marketing giant (google->golang, mozilla->rust) behind them, but you should check them, they're insane.

https://github.com/stevana/armstrong-distributed-systems/blob/main/docs/erlang-is-not-about.md https://i.imgur.com/9g6CMqK.png

Building https://srcbook.com // creator of the https://blockchainsmokers.xyz

Most great programming languages "win" for the wrong reasons.

Java got pushed by Oracle hard in entreprise
Python had great scientific computation libs (actually they are in fortran but python has great NIFs), won academia and ML
Google pushed Golang (arguably Go is still good tbh, Dart failed and also had google)

Dart is thriving in use with the Flutter framework

But yeah failed in trying to replace JS