Iʼm really starting to feel the same way. While Iʼve been using OS X for quite a number of years. I started using OS X in 10.3 and Iʼve been using it happily ever since. At the beginning, I used all of Appleʼs built in apps. Gradually, Iʼve moved away from Appleʼs apps.
In the last couple of years it has gotten to the point were the only Apple app that I use is Safari. I have still enjoyed using OS X as it looks nice, in recent years it is very energy efficient and it has been very stable for me. I usually go months without rebooting.
But the stability part has definitely taken a dive with Yosemite. It hasn't crashed on me in a couple of months but, there seem to be little bugs all over the place. The most annoying one to me is that when I switch spaces, all of the menu bar icons move around. That in and of itself wouldn't be that annoying but, it seems like that causes everything to freeze while it is happening.
Since Yosemite was released, Iʼve needed to forcefully reboot my computer more than I ever remember needing to do so including, Windows 95-2000. Usually what happens when I need to reboot is that I try to wake my Mac from sleep and it just doesnʼt. I hit a bunch of keys, click the mouse a bunch but, the screen never changes from black. Iʼm not sure if it simply not reading the input or if it gets stuck trying to wake up. Either way, its maddening.
iCloud has been awful. iCloud drive is exactly the file sharing solution that Iʼve been looking for but, its execution has been abysmal. iCloud has become nearly unusable for me since the release of iOS 8 and Yosemite. Prior to that, iCloud syncing seemed to be working just fine for me, I used it for a number of apps. Now, it seemingly doesnʼt sync for hours at a time. It certainly isnʼt something that I want to keep using.
Iʼve really thought about leaving OS X behind, like Geoff has. Really, I donʼt need OS X for the work that I do. Really the only things that I need are a unix terminal and a web browser but, there are a few apps that I would really miss. For me, the main thing that I would lose is Dash, which is an app that I find to be hugely helpful for software development. I think I would also miss a native 1Password app. Sure, the Windows version of 1Password works under Crossover but, that isn't a great experience. There are a number of other apps that I use which Iʼm sure I would only be able to find crappy replacements for. For me, this has always been Linuxʼs weakness: While there is some really powerful software for Linux, the user experience has been dreadful. Seemingly the people that develop software for Linux donʼt seem to care at all about user experience. That is what I would miss most, the vibrant ecosystem of 3rd party OS X developers.
There are also some OS level features that I would miss. Iʼm sure that I would also miss the power management of OS X. I'm sure that I would lose a couple of hours of battery life should I move my machine off of OS X. Also, Iʼm sure that the Macbook Pro that I use would run considerably hotter. Finally, the last time that I tried to run Linux on a Mac, the touchpad drivers were awful. While they seemed functionally sound, they felt really awful in comparison to OS X. I do frequently use my Mac without a mouse attached, so this change would bother me quite a bit.
On the other hand, my work involves Linux. Switching to Linux would mean that I gain some really awesome tools to make my work easier. Not only that, at this point I would also be gaining stability by choosing a Linux Desktop. That isnʼt something which I ever thought that I would write. Appleʼs software appears to be at an all time low for stability yet, their hardware has never been better. I wish that Appleʼs software would live up to their hardware. While I think that I would see some benefits from leaving OS X, I just feel like I would be leaving too much behind at this point. Iʼm not excited for what Apple will choose to do their OSs next.