Convenience? Windows-only stuff? I work for a corporation, and use several windows-only programs (example: Genexus).

My favourite PC game is still Windows-only (Magic Online).

I've built my own computers for the last 15 years.

I used to dual-boot Linux, but I found out I never used it.

I (mis)use corporate or partner licenses, or OEM Windows. This new licensing option is very appealing.