I would disagree. Depending on what you use your computer for you may find an alternative operating system that suits your needs. If you have Windows dependant software or workflows then you will eventually find that support for your preferred version of Windows is withdrawn. Microsoft will offer extended support for a minimum of 5 years from the date of a product's general availability. https://support.microsoft.com/en-us/help/13853/windows-lifec...
Windows 7 has extended support through January 14, 2020[1], so even if he was forced to do so for some reason, it likely wont be years. And with the rate things are changing, who is to say that Windows will even be a requirement for him in 2020?