How many computers do you have at your desk? Or are you running some of these systems in VMs?
My dayjob primary workstation is Linux with a Win10 VM, as well as a separate stand-alone Mac with a Win7 VM.
At home, I have a Mac with Win10, Win7, and Linux VMs, a Linux laptop, a Mac laptop with a Win10 VM.
I stopped installing Windows "on the metal" many years ago.
My wife has a Mac with a Win7 VM. She also has our only remaining Win7 "on-the-metal" install, a 10-year-old laptop, because she refuses to migrate to Win10 and that old box runs her old programs just fine.