Eight compelling reasons to leave Apple’s OS X apps in favour of 3rd party applications by John Martellaro at the Mac Observer.
I invite you to read the article because John’s arguments are extremely valid and well documented. I can see where John is coming from being an old Mac user like myself.
My skepticism with that approach is due to the fact that in today’s Apple world, you cannot talk about OS X without taking into account iOS. The two operating systems are complementary of each other, so it’s important that data can seamlessly transfer between the two operating systems and interfaces be as similar as possible.
If I were working exclusively on OS X I would probably change to some 3rd party apps to do my work. As it stands, I prefer to work with slightly less powerful apps, as long as they are well integrated into iOS too.