interesting how Windows and Mac are almost at 100% of DRM enabled, meanwhile linux is only at 33%

anyone knows why is that?

Users of open source operating system want to be in control of their computer, DRM vendors want the same -> to be control of user's computer, which is a problem. Nearly every DRM system involve heavily obfuscated closed source binary blobs, that's something neither the users nor distro maintainers want to touch if possible.

I wish I could select what OS to sort values for

see f.e. "Highlight" (Resolved value of the Highlight system colour keyword, as RRGGBB), which has bajillion different values for android - and I can't find the most common ones for linux