I don't know whether operating systems need to be "cool". Is Windows, the market leader, "cool"?

Or rather, I don't know whether those who think PewDiePie is "cool" have the same understanding of "cool" as computer nerds do.

Because computers are cool. Its easier to point to a general operating system than to all the cool software that runs on them. When people say Linux is cool its not because of just the kernel, its everything from the culture to the software stack and ethos