I’m C# programmer by profession, I’ve been for about 15 years. We have one Chinese worker in our company who is NodeJS enthusiastic. I told him that ASP.NET Core is lot faster than NodeJS. After couple days he told me that he did benchmarks that proves NodeJS is fast as ASP.NET Core. Then we together looked at his code. Both platforms where doing same MSSQL database queries. So both “benchmarks” where actually database bound and where actually testing database performance. This just one example, but at least in our company’s large web app we don’t do almost any highly CPU bound work. Most of the time our app is database bound or bound to some other IO.
I think you want some magic language that can do everything and maybe Elixir is not for you then. There is only one language that I know of that can do almost everything except kernel programming and that’s C#. You can do high performance web apps (soon C# in browser with Blazor and similar to Phoenix LiveView Razor Components), desktop apps, games (lot of released games are done with C#, Unity & Monogame), console apps, machine learning, embedded IoT and probably lot of other stuff. So if you want one language to rule them all I suggest C#.
But I think stable low latency even under heavy load, scalability, fault tolerance, immutability and other awesome things that Elixir/BEAM provides are much more important at least for web apps than language with high raw performance. You can’t example use horizontal scaling to make latency better.
