Whether you like the way apple runs their business or not and whether you want an iphone or not, is strictly a personal choice.If you take your 2 year old car to the dealer for maintenance and afterwards it accelerates like a 50 year old moped and the manufacturer says that's normal, buy a new car if it's a problem, you think that's okay? Because that's exactly what Apple does to their iPhones.
There was a firmware patch to the Honda Civic Hybrid that dealers were installing on every car they could get their hands on, even just for an oil change without telling the vehicle owners. It killed the fuel efficiency to compensate for design flaws in the battery system. Considering the only reason to shell out for a hybrid was the fuel efficiency and this change made it about the same as a pure gas model, it was a major problem and of course led to class action lawsuits. That was not okay, and what Apple does is not okay either.
My major complaint about Apple is that they don't let you downgrade again, so I never bothered to upgrade my phones for fear the new version would kill it and I'd be stuck with a piece of garbage until I buy a new phone. For that reason, I always kept my iPhones on the version they shipped with, and that is a huge part of why I haven't owned an iPhone for years. Honestly, I'd probably buy the next model if they allowed the OS to be downgraded (and it had a headphone jack).
However, running new software on old hardware and not having it run at all as opposed to having it run at the same speed, or faster or slower is not limited to Apple.
http://www.pcworld.com/article/2951...-windows-10-the-answer-will-surprise-you.html
They do, my 6s is running faster on ios 10 than ios 9. While separate and apart from this, there are always various (and plentiful) threads about android slowing to a crawl or lagging or what have you. Whether it's software, hardware or both, the end result is the same, it easy to point the finger at "Planned obsolescence" by android manufacturers, without any reasonable certainty as if it's really that.You mean to tell me that the most valuable company on the planet with billions of dollars in the bank can't optimise iOS for a handful of devices?