Personally I went with Mac OS X in the past so that the OS upgrades would be simple and pain free, and I wouldn't have to re-install the whole OS just to fix things. If I wanted that I would have stuck with Windows XP in the past and have the mentality I needed to re-install the OS just to fix issues (such as OS slowness). Personally I know I don't want to waste my time having to re-install the whole OS clean, and then re-install all the apps I depend on to get my job done. So for me that is a last case scenario, not my first thought. I am shocked you expect everyone to do clean installs for any issues that come up.
In my case I was in denial and it looks like I finally stumbled upon a good forum thread with other people having my exact issues (
https://discussions.apple.com/thread/7000724?start=0&tstart=0). Following the thread it looks like more and more the issue is with the Intel 4000 video drivers, since most people having the issue have Intel 4000 integrated graphics. I know with my system they already replaced the logic board, and I read other people having most of their whole system hardware replaced. So that seems to eliminate hardware issues. I know for myself it was a headache to fight the crowds (and take forever to get an open appointment) at the Apple store to get something replaced that didn't fix anything. Other users had clean installs of the OS and still exhibit the issue. So if it ends up being the graphics drivers which I suspect is the issue, I wonder how Apple is unable to make a stable OS in which they only have to support a limited amount of hardware. I run a dual boot with Windows 7 on that same machine and I have no issues at all. Makes me gain much more respect for Windows considering all the hardware it has to support. So based on my experience recently, it tells me Apple has a quality issue with the OS they need to get straight. I have Snow Leopard running on another machine that has been upgraded from multiple past OS'es, and I have way more software and hacks on that machine installed, and it is rock solid (including having Little Snitch). I have a 2 MacBooks with almost clean installs, and both exhibit various issues. So yes I do blame the OS quality in the recent releases, so much so I have been booting into Windows 7 and using it instead of Yosemite, since I need to get work done. I use the exact same software and use WIndows in the same way, and surprised how much more stable and responsive (GUI wise) Windows 7 is. I am a long time Mac OS X user and do prefer more of a Unix type OS system, but I am starting to grow weary of always trying to have to track bugs down to keep thing stable in the recent Mac OS X releases. As I said prior, I really hope the next release focuses more on getting things more stable so I am not forced to boot into Windows 7 to make the system run stable.
