you obviously haven't used win 7 before SP1. I used win 7 from the beta to the latest versions and I can assure you that after thousands of installs it had a ton of bugs, blue screens galore. before the 8.1 version, win 8 also had some big problems.From my own personal experience, I have to disagree. Depending on hardware configuration, 10 updates break things. 7 and 8.1 updates never did. I've posted to several threads about this, so I am not going to repeat myself. If you would like to educate yourself about this, here is one story about just one problem - http://www.infoworld.com/article/31...rsary-update-bug-drops-wi-fi-connections.html
There are many, many, many issues with 10. Because your experience is acceptable does not mean that everyone's is.
But since win 10 builds on top of win 8.1 major bugs are rare. I'm not saying that they don't exist, but it's clearly a much more stable OS than 7 or 8. It's also much easier to fix win 10 than win 7.