As I told you, you have answered the question. You said, yes, maybe it does slow down devices, but it doesn't really affect me, and it does not impact my day-to-day use, I told you it was fine. Of course, I don't expect you to agree on the degree it affects performance, because it is subjective, but I asked if he thought whether it slowed it down generally, and it eventually does. Perhaps not noticeably - or not at all - in ONE iOS update (as an example, iPhone 6s/ iPad Pro 9.7) from iOS 9 to iOS 10, in which performance remained the same, but you cannot take that as the norm, because it isn't. There are a plethora of cases in which performance was affected severely - in my opinion - and picking one with a new device - or the newest - doesn't invalidate the argument.
To return to what you said about my ad-hominem, it isn't, because I outlined the outcome of both possible answers, and he gave none, so I am considering a hypothetical reply, and not attacking him on what he said.
You are right on the strawman part, but in a different way. I admit my argument was flawed - I am referring to the part in which I tackle an issue that was related to the main point but was not the main point. You can leave it there and classify everything as flawed and irrelevant, but I brought that up, because we have exhausted debate on the main issue, and I wanted to know his opinion on a highly related - but not the original, which by definition, makes my argument a strawman.
If he wants to only stick to the main point and absolutely refuse to partake in the discussion of any related topics, it is fine and flawless (logically and argumentatively speaking, and I did tell him I agreed on that) but I do not find it acceptable. It is highly related, and therefore relevant to the issue at hand, even if it isn't the issue at hand itself. As I said, discussion varies. (Which by definition makes my argument a strawman, but I tackled that already).
[doublepost=1530101606][/doublepost]
The part I find is forced obsolescence is the Apple forces you to update if you have to restore. That can be considered planned obsolescence, even if Apple does not admit it.