I asked my FaceBook friends about their experience in upgrading to Windows 10. 80% said that their experience is positive.
I decided to take the advice of the 80% and upgraded my home PC to Windows 10. My experience so far is positive.
I had problems with connecting to my bluetooth speaker under Windows 7. This problem had been solved in Windows 10.
The user experience so far is satisfactory.
I now have to upgrade my office PC and my laptop.
Note - if the recommendation came from 69% (instead of 80%), I would not have made the change. You know that 69% can be idiots, right? Hahaha.