Companies have long turned to open source to save money. Surveys over the years have captured customer intent to lower costs through open source; analyst firms have called it out, too. Similar surveys and/or analyses historically identified common inhibitors to adoption, including support and security.
And yet, attitudes toward open source have almost completely changed over the past decade. Well, except that organizations still expect to save money by using open source. But the biggest change of all may well be in the area of security.