From a usability perspective, I consider OS 10.10 the best version of OS X ever (and I manage development and UX work in my day job). It's the reliability and Q

From a usability perspective, I consider OS 10.10 the best version of OS X ever (and I manage development and UX work in my day job). It's the reliability and QA that has really been slipping with OS X in recent versions. There are a lot of bugs, many features take several patches to work properly, and with the yearly release schedule, a new version of OS X doesn't really become stable until a new version is announced. I've been using OS X since 10.1, and the reliability of OS X has taken a dive ever since 10.7 launched. 10.6 was certainly the high water mark for reliability in OS X, and probably the best traditional version of OS X (and a version that I'd recommend a lot of people and companies stick with if it were still patched). Feature wise, I really like 10.10. It makes me more productive, the software is easy on the eyes, and the iOS and iCloud integration is pretty great. I like all of that. But I really wish Apple would stop trying to push out new OS versions so fast and concentrate more on QA. Even iOS has been seen some bug creep lately. I get pushing iOS, since the mobile space is so new, but do I really need a new desktop OS every year built on a paradigm from 30 years ago?