Obviously there's a spectrum and my personal experience is not representative for the industry as a whole. From the people I've worked with in 2 decades, maybe 2% choose Windows over Unix when given the choice, even when most customers were using Windows. At my current job, I literally know nobody using Windows (>$1B software company with high 3 digit or low 4 digit number of engineers). Not sure why anybody thinks a Windows only policy would be a great idea in this labor market.