“Almost 100% of web servers on the internet are now Linux”
Actually, that is a statement often repeated, but not true.
It is still pretty much a mix of everyone.
I stand corrected... Article as of 08.25.16 But I am sure it is higher now.
“Unix and Unix-like operating systems power about 67 percent of all web servers. At least half of those run Linux—and probably the vast majority.”
https://www.wired.com/2016/08/linux-took-web-now-taking-world/