Nothing is free!
You will be paying one way or another. Win10 home will be paid for by advertisements in the "apps". MS is selling you just like Google. Most of the included apps in the home version will be "Ad based", and stripped down versions (think solitaire, wordpad, notepad, etc.). To get rid of the annoyances, or to use the "full" version of any included apps, you will need to "subscribe" to the "pro/enterprise" version.
For me, Windows 7 Pro works fine and I will continue using it until the computer needs to be replaced. If at some point Sonar stops working on Win7, I will no longer upgrade Sonar. If I was unfortunate enough to have Win 8 or 8.1, then I would probably bite the bullet and go for Win 10.
Just my $.02. YMMV