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FreeBSD has been released in 1993 and has been a well known OS in the hosting world.

Erlang has been released in 1986 and has been a well known language for message systems.

When I think about exotic I think about some new tech that sound really nice but is still very unproven.

JavaScript is from 1996, it's 25 years old, and apps built with it are used by billions. With regards to the backend, it has a vibrant full stack ecosystem, it's performant, simple, and easy to hire talent for.

It's okay not to enjoy JavaScript (I'd always prefer to go with Dart or Rust myself), it's okay thinking that other languages (and ecosystems) are better equipped to solve some problems, but calling it unproven and exotic is very surprising to me.

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