To answer OP:
Not really. I bought my 1st gen iPhone in what, 2007? Im actually amased the platform has stayed so consistant, allowing me to make updates and get free new features over the course of these years.
Its all in how you look at it. I bought a product that for its time was amazing, a device from the future. It had a hardware and a software. Then Apple said, "so here is a new software thats even better, there you go, just take it". How can I be disappointed? Its just a bonus, really.
The only thing that wasnt a bonus, was how OS 3 was kind of slow for my iPhone compared to the previous OS. Now my iPhone is very sluggish. So even if Apple threw multitasking after my grandmother, I still wouldnt have picked it up. I dont want more features packed into a OS thats already raping the RAM and processor.
Its been a good ride, for sure. But if I want to continue getting cooler rides, guess what, this time I have to pay for it. Nothing wrong with that, I have basically gotten several phones for the price of one, considering all the software upgrades.
And my old phone will still work as before, if I dont want to upgrade. Its amazing, in this day and age where the quality of electronics are ****, my iPhone has always been good to me. If only I could remember the dozins of times I have dropped my iPhone onto concrete or asphalt, thrown it at people or walls, pouring coke at it -- it still works, haha!