Most companies are writing software with software developed on Linux first and for Linux first (or Unix) and later ported to Windows as an after thought. I'm thinking Python, Ruby, NodeJS, Rust, Go, Java, PHP but not seeing as much of C#/ASP.NET which should at least be 20% of the market?
Only two explanations - either I am in a social bubble so don't have exposure or writing software for Windows is so much easy that it takes five times less engineering muscle.