You apparently don't really know much about what you are talking about. Having huge sales numbers are great for customers to jerk over but it doesn't really benefit investors at all. Apple pays pathetic dividends so most of the value comes from growth, not profit. Huge numbers that are the same as last year nets you no return on your investment. Plus stock investment is based on predicted future value, not a score card for what you have done in the past.These prognosticators are ridiculous. First of all, even if iPhone sales don't see YoY gains, the sales numbers will still be HUGE, so it's all relative. And as Apple always points out, the only thing that really should matter is that they are making, not losing, money. The iPhone, albeit a big portion of their sales and profit, is but a piece of the puzzle.
I think that is why Apple is focusing on further building out the eco-system that keeps consumers engaged, whether they're buying a new iPhone every year or not. iPhones, iPads, rMBP's, rMB's, iMacs ATV and AW are all things that at some point you don't need to get new every year (given their high quality and useful life is more than 1 year). And with Apple Music creating yet another income stream and one I'm subscribed to, Apple is getting more money out of me [than they previously did], regardless of whether I'm buying a new iPhone each year.
Apple does like to point out that making money is better, but they never actually give that money back to the owners so it's mostly lip service.