Two examples here. One is a friend in another state, she has a Windows 7 laptop but no internet. I sent the Win10 install disk but she did nothing, confused by it all. Another was a sibling, also some distance away, the rural area only has very slow internet. Her Windows 7 laptop had stopped getting security updates over a year ago and the service refused to start.
The ones who didn't upgrade were the confused or no-access users. I had access and the smarts but neither sent me the old computers. They'll be buying new laptops. Sure, they'll be faster and better but not that much faster IMO. (I have two desktops - one was Win7 with i7-4770K and I was shopping for the two-generations-newer i7-6700K I think, but I checked passmark site and the newer is maybe 10% faster.)