Usually, expressivity in a programming language is not really a matter of syntactic constructs but a matter of semantic constructs. But choosing a programming l

Usually, expressivity in a programming language is not really a matter of syntactic constructs but a matter of semantic constructs. But choosing a programming language involves much more than semantic (or syntax). Depending on the situation, community, compilers and tools, libraries, consultancy houses, documentation and books, are all reasons to choose or not a language. Some even says that the number of programmers available on the market for a language is important. I don't think it is a good reason but a related one is: your existing user base is composed of companies and consultancies with their own programmers; you can't abruptly choose a different programming language than the one they know.