I'm not surprised, I used to work for a cloud SaaS provider, everything we had ran on Linux, everyone in the office ran on Macs and Google Docs.

Then as we grew the finance team, they found that Google Docs couldn't handle the spreadsheets they needed, and even Excel on Mac wasn't compatible.

So, the Finance team started running VM's where they could run Windows and native Excel. Then as they grew (in size and power) they found themselves using the VM so much that they started moving from Mac to Windows laptops. Then as our windows footprint grew, more and more departments started requesting Windows.

When I left around 25% of the ~1000 person company was on Windows (almost all on the corporate admin side, engineering remained overwhelmingly on Mac), and the Windows support team was twice as large as the team that managed the Mac infrastructure.