Music production is overwhelmingly Apple. It comes from the fact that Protools was Mac only until the late 2000s and Logic Pro, Apple's DAW and alternative to Protools was also very popular and also Mac only. That left Cubase for windows and a few others like Ableton and less popular DAWs like Reaper, fruity loops etc. Today there are a few more options for Windows like Studio One who is very good though

Add to that the fact that most of the audio interfaces were firewire and plug and play on mac and a real struggle on windows. With windows you also had to deal with ASIO, and once you picked your audio interface it has to be used for both inputs and outputs (still to this day) forcing you to compound interfaces with workarounds like Asio4All if you wanted to use different interfaces, while Mac os just lets you pick different interfaces for input and output

Linux had very interesting projects, unfortunately music production relies on a lot of expensive audio plugins that a lot of time come in installers and are a pain in the butt to use through proton/wine, when it's possible at all. That means that doing music production on Linux means possibly not using plugins you paid and not finding alternatives to them. It's a shame because I'd love to be able to only use Linux

> most of the audio interfaces were firewire

With Apple removing Firewire support this Fall, and so many devices still plugging along in so many studios, I wonder what's going to happen this fall.

> That left Cubase for windows

When I was at music college doing production courses, they exclusively taught Cubase on windows.