I've been an Apple user for almost a decade. I started with the iPod Video in 2006. Then came the MacBook, the iMac, my first iPhone and the iPad (both iPhone and iPad have been replaced with newer models at least four times). Also I was a MobileMe user and nowadays use several Apple apps, including Aperture (!!!). I've bought several Apple accessories too. So, at the end, you could say I'm well-embedded into Apple's ecosystem and I have at least some basis or background to give a reasonable and well-argued opinion.
Do I feel Apple is lost? F**k yeah—that's almost a fact and you don't need me to start specifying the reasons. Since Steve Jobs died—and Cook took over, started his politically correct agenda, implemented his soft-management methodology, gave Forstall a kick in the ass and promoted Jony Ive to out-of-control-hardware-and-software-design-super-führer, Apple has been acting in a very, very erratic way, to the point where the quality of some of their products (and important ones, be it on the hardware, software or services side) have become really questionable.
Going back to your question, you mention “Apple” in the title and the poll, but end up asking about OS X specifically. On the other hand, I think your options don't apply for my own personal case.
But I'll tell you this.
Have I, for the aforementioned reasons, seriously thought of leaving Apple? YES. In fact, I'd love to ditch my iPad Air and its sh***y OS9—and perhaps try something like the Surface or any other alternative. I'd seriously consider trading my iPhone 6 for some hi-end Android device too. Finally, I have seriously thought of going Linux over my desktop and laptop.
However, I have some concerns. After all, and considering that everything is still working (to a certain degree), changing platforms is not an easy or without-consequences move.
Right now my main reasons to not leave the Apple ecosystem are:
- Google's sh***y ethos when it comes to privacy and big data (a specially sensitive issue nowadays).
- Lack of support for some of my favorite apps on other mobile platforms.
- Lack of support for any important app on Linux.
- Lack of multi-platform integration (I'll give it's super easy and comfortable to have iCloud working through desktop, tablet and smartphone).
If all of these issues could be addressed, I'd leave Apple right away.