I love Windows 7 to death, but all good things must come to an end. Windows 10 is much better now than it used to be. Althought it tends to suffer with very old games. You can dual boot windows 10 and 7. That's what I have
I still have Windows 7 on three machines, Windows 10 Pro is on my main machine because I need it to be up to date and secure.
There is nothing inherently wrong with Windows 10, it's just different. If you are upgrading to Windows 10 Pro, you'll at least have the opportunity to pause updates, that is the only real problem with it.