"What should we read into the fact that R&D has more than doubled over the past three years while sales growth was sort of a fifth of that? Are R&D investments just less efficient than they were in the company's history, or should we think about that as incremental spend for products that haven't yet come to market?
Timothy Donald Cook - Apple, Inc.
There's clearly some amount of R&D that are on products that today are in the development phase that have not reached the market, and so that's a part of it. And we feel really great about the things that we've got. We've also put a lot of emphasis on our Services business as well and on making the ecosystem even better. And so we're very much, we're confidently investing in the future, and that's the reason you see the R&D spend increasing."
My super informal analysis of where Apple's priorities are:
Term Count
iPhone 64
Mac/macOS 17
Services 16
iPad 15
Watch 8
(http://seekingalpha.com/article/4014922-apple-aapl-q4-2016-r...)