Because programming languages are different from regular software: for a programming language to be useful, it needs an ecosystem of libraries, package manageme

Because programming languages are different from regular software: for a programming language to be useful, it needs an ecosystem of libraries, package management, and IDE support. It's not the 80s anymore, when everyone wrote their own libraries anyway, maybe shared them with friends or colleagues, and didn't expect anything beyond a small standard library. Today, a new language has a small window of a few years, after which it either achieves escape velocity, or re-enters the atmosphere and burns up. A new language which hasn't received major updates for two years, is effectively dead. It's a social phenomenon, not a technical one.