Phones slowing down with every firmware update might be true for Android devices as well. More features are added with every firmware. What my issue with this whole thing is, Apple was wrong on their part to suggest people to upgrade to newer iPhones instead of offering battery replacements first. Introducing battery replacements for half the cost isn't going to cover the upgrade costs that many users paid out of sheer frustration of slow iPhones. Another issue is that the firmware updates are forced down your throat. Even though it calls for a user input to go ahead with the update, the ****** software update pop ups are irritating and can be clicked accidentally. There should be a feature to totally turn off automatic OTA updates. Wishful thinking.... Apple should enable users to downgrade to lower firmwares instead of trying to stop jailbreakers at every step. Apple is concentrating on all the wrong things and innovation has gone for a toss since iPhone 5S/6.
I'm on an iPhone 6S, but my next phone is definately not an iPhone. Am seriously considering going the Android way after staying with Apple for 6-7 years. I feel sad to let go of the Apple ecosystem (except iTunes... thats a ****** curse), but I will settle for Android devices mainly because of easy file transfers and the ability to load whatever firmware version, especially for advanced users who know what has to be done on Androids to keep them malware free.