I have heard all the reasons why they don’t want to upgrade, but most people are repeating what someone told them or what they read on Facebook or Twitter. They don’t have an opinion based on personal experience. I have been using and programming computers for 35+ years, starting with mainframes in 1979. So, I get asked about upgrades. :-)
I did not recommend upgrading to Windows 8 or 8.1. I strongly urge anyone who asks about Windows 10 to upgrade. The thing is, in my view, the ones that don’t know which version they’re currently using probably are the ones that need it the most. I mentioned my wife in another post, for 17+ years she couldn’t tell you which version of Windows she was using, up until now. She tells her friends that she’s on Windows 10 and she likes it. Anecdotal, I know, but it’s a first.