First impression is that this guy doesn't do serious development when the only three application he needs are Chrome, Terminal, and Sublime Text. The one major

First impression is that this guy doesn't do serious development when the only three application he needs are Chrome, Terminal, and Sublime Text. The one major advantage that macOS has over Windows is the Unix environment. So that means all command-line development tools just work. And not to mention that there's a lot of pretty development tools with a GUI that's been built for macOS. In Windows, you could replicate this with a virtual machine. Furthermore, you most likely don't want to be running your application code in Windows anyways. The best practice is to develop in as close to an environment as possible to what you will be using in production. However, with the proliferation of Docker, it's becoming less and less dependent on what your host OS is going to be. Still, it's just more convenient to have a Unix environment.