Not going to upgrade my Win7 systems to Win10 either, and currently I would not recommend touching it with a ten-foot pole, unless they change some things fundamentally, which I do not think they will. Got it installed and have it currently running in a virtual machine. From what I could see at my firewall and security logs it is basically a privacy nightmare, even if you disable everything from within the menus it is still transmitting back and forth. Software showing similar behaviour is usually marked as open candy/adware, guess that is the reason why they give it away for free. I do not even consider it to be an OS anymore, it just wants to be a cloud frontend for the future, running everything as a service. That you can still install programs/games, is just for backward compatibility in my opinion.
In case you are interested in some details, have a look at this:
https://i.imgur.com/iHge6RJ.jpgCould not believe it when I first read it, but after a week of doing some tests and running my nose through the logs I can confirm most of it.
Please, excuse me for posting my opinion since this is defintively off topic, but I have a strong opinion about privacy and software security, and people should at least know what to expect when they upgrade. And no, this will not be the last OS MS is going to release - just a day before you could download the upgrade they released the support dates. Extended support will end in 2025. Btw. extended support for Win7 is supposed to end in 2020, which I hardly doubt due to its large popularity - most companies just finished upgrading their systems to Win7 and to the x64 architecture.
Best regards, Peter