Part of this though is because software was historically built for windows in a way that it isn't anymore. Even at tech companies, where the majority of employees are using macbooks, you'll often see people in the finance department using windows machines.

I imagine as the growth of SaaS continues we will see less of this, especially because it's much easier for the IT department to manage one type of computer where macs tend to have a higher build quality than most windows based machines.