The UI is very ugly and early 2000's though. Those horrid blue bubble scroll markers and stuff
He didn't say the prettiest OS X release, he said the most stable and reliable, nothing to do with the actual interface.
I happen to agree. Snow Leopard (10.6.8) is the fastest OS X release I've ever had the pleasure of using. Lion was horrible of which ML, Mavericks improved upon. Yosemite seems better in some areas but in many areas, just not unstable.
I bet this is "the one". I can't really imagine a third GM release although it can of course happen.
I wouldn't be surprised if Apple had some documented bugs they knew they wanted to fix, but they wanted to disrupt the Windows 10 party a bit. Seriously, GM Candidate? Has Apple used that terminology before even once?
Also... "Candidate" means exactly that: It could end up being the actual release. That's the definition of candidate.It doesn't mean "this isn't final".
I've played with W10 Tech Preview, MS is on the right track with this one. They went even more lightweight, it's more responsive and it is not as flashy as it needs to be. Reminds me of XP and Windows 7, which were their best ever OS releases. Yosemite is definitely on the wrong track with its silly transparency effects that just kills any smoothness experience for me as of GM 2. Turning it off bought me back to Mavericks performance. The silly mission control, desktops animations and so on are still stuttering on my rMBP '12. I wish I could turn them all off.