Actually this is very new. Snow Leopard is the holy grail of polishes, Apple held off on all "eye candy" upgrades and went deep into the nitty gritty of the OS to rewrite Finder, add Grand Central Dispatch, and generally clean and speed up the system. Starting with Lion, Apple shifted to a yearly update schedule where they began adding features without fine tuning them, leading to a horrible bloated mess. It took several years and OS releases after that to bring things into somewhat of a useable state. Now, it seems that Apple neglects to do any fine tuning until there is a negative report in the press, or a class action lawsuit is filed against them
Make no mistake, I do like Apple products, and have been an Apple customer for quite a few years. I really appreciate Apple and what they do, I simply want them to return to the basics of "it just works," and clean up after themselves after they release new software (and hardware)