"Today, Scott Guthrie, Microsoft's executive vice president of the cloud and enterprise group, said in an interview, "it's about half now, but it varies on the day because a lot of these workloads are elastic, but sometimes slightly over half of Azure VMs are Linux." Microsoft later clarified, "about half Azure VMs are Linux.""
I think they meant majority of azure clients (i.e., people running vms on azure) running linux, not that azure itself runs on linux. Linux was above 40% sometime last year in azure stats, and I think it crossed 50% sometime recently.
"Today, Scott Guthrie, Microsoft's executive vice president of the cloud and enterprise group, said in an interview, "it's about half now, but it varies on the day because a lot of these workloads are elastic, but sometimes slightly over half of Azure VMs are Linux." Microsoft later clarified, "about half Azure VMs are Linux.""