I use both Windows 10 and OS X on a rMBP all day at work. I definitely think Windows 10 is way more stable and polished.<p>I constantly have problems with OS X WiFi connecting&#x2F;dropping out, this has only been a recent thing since 10.11 (before OS X wifi support was incredible).<p>I also have problems with Spotlight screwing up. I use spotlight for launching apps, and it often just loses all the apps which I use all day every day. Instead of finding &#x27;Skype&#x27; for example, it&#x27;ll return a list of all the times I&#x27;ve mentioned Skype in emails instead. Again, this broke in 10.11.<p>I never really use the new features in OS X, which is fine, but 10.11 especially has so many regressions in it for me it is pretty annoying. It also absolutely blasted my unix config  in a really hard to fix way, which hasn&#x27;t ever happened on a previous OS X update.