Over the course of the last four years, the amount of instances where Azure was mentioned in specific open source job openings has increased five fold. What we are seeing seems to mimic what Microsoft itself is saying. In a ZDNet article published during the latter part of last year, Microsoft executives discuss the growth they have seen in instances running Linux on Azure. From 2015 to 2018, Microsoft saw the number of Azure virtual machines running Linux grow from 25% to 50%. That is a quite notable growth trajectory in a fairly short time frame.