I'm hesitant as well, for the same reason. Having said that my personal PC (desktop) is still running well 3+ years after initially installing Windows on it. My inlaws' very old laptop is still running fine (it's at least 8 years old and was upgraded (on accident!) from whatever version of Windows it was running prior to 10.) Aside from user errors (accidentally installing adware toolbars in Chrome, etc) there really hasn't been any real issues as it pertains to Windows itself.