Using all of them for various tasks. Mostly running windows on my machines to get work done, browsing, gaming, programming, rendering, office stuff, etc. Macbook I used for university stuff and some special programs as there was no competitor in battery life at comparable price range only double the price from Dell with lousy support. It was nice at first but got worse with every update in my opinion, still one of the fastest OS. Linux running on server side for some central stuff with some VMs. Mostly as NAS currently and some streaming. Home Automation in future. Got some Suse, RedHat, Solaris, Ubuntu, Feodora, OpenBSD, FreeBSD etc. over the years but mainly now on good old Debian.