Computerworld - https://www.computerworld.com/article/3276308/microsoft-windows/gartner-enterprises-should-demand-2-full-years-of-windows-10-support.html#tk.rss_all
Corporate customers should lobby Microsoft to turn a temporary 24-month Windows 10 support lifecycle into a permanent fixture, according to Gartner Research analyst Stephen Kleynhans.
“Twenty-four months would be better for everybody,” Kleynhans said.
[ Further reading: How to handle Windows 10 updates ]
More than a year ago, Microsoft formalized a twice-annual Windows 10 schedule for delivering feature upgrades, promising to support each upgrade for 18 months. A feature upgrade released in September 2017, for example, was to be supported with security patches and other bug fixes until March 2019.