Windows 10 is much better than Windows 8 and 8.1. So upgrading from those is a no brainier. The problem is that Windows 10 has both better and worse things than Windows 7.
Do you want to watch DVDs, use Windows Media Center, or play some simple games like solitaire without ads? Windows 10 you are paying for 3rd party software there.
Will all your hardware work with Windows 10? I have hardware that is officially supported in Windows 10 and I can't get it to work because the OS says the signature is not valid. It isn't only the company, but Microsoft says it is compatible. Will your software work? Even if it says it will work, I've found some that doesn't.
Basically Windows 10 may be better than Windows 7 for what you do, but it is a crap shoot, they had to have something that was better across the board than Windows 7 and they didn't deliver.
I am still waiting for my start menu back. That Frankenstein tile creation does not count.