I managed to avoid the whole Windows-on-DOS family. I went from DOS 6.2 to Windows NT 3.51, then Windows NT 4, then Windows 2000, then Windows 7. Only the good ones. Why run Microsoft's dud products? Now, Ubuntu 18.04 LTS. It's too bad that Microsoft no longer sells a good desktop OS. Windows 10 is a warmed-over tablet GUI forced onto a desktop. With ads. With terrible updates which break things. Do not want.
... as a Service.
I'm stuck with it, but God, I miss Win2k and Win2k3.