Investigating often won't really tell you much about how it actually is on your device for your everyday use. Whether or not you investigate (as you should anyway) doesn't in any way undermine the idea of being able to downgrade to at least the previous version. And as of Apple providing more updates and Android barely providing any for a lot of people, that's a fairly moot point as far as this discussion goes in terms of being able to downgrade.
As we have seen, some users feel that the updates don't impact their performance, and some do. So, doing an investigation based off of customer feedback isn't going to help much. It's apple's issue plain and simple. Passing blame off to the consumer doesn't help anything.
If i see 1 out of 10000 users reports saying that their iPhone 6 are slow, i (or the common guy/girl) will tend to believe that nothing is wrong with iPhone 6 performance and that 1 out of 10000 should be a isolated problem (Apple or user related, doesn't matter)...
If i see 5000 out of 10000 users reports saying that their iPhone 4S get slow after a iOS upgrade, then i will tend to believe that something is going on and that if i update my device, probably i will get a slower experience of my device.
As for the "moot point", i wasn't trying to make any.. I only deducted that the upgrade model (or models, since it's brand dependent) of Android, probably, was more suited to the OP needs...
I know that. Apple should broadcast this fact when they roll out their updates, rather than the usual spiel of 'performance improvements'. Your average man/woman/child on the street who doesn't understand tech (let's be honest, that's most iPhone buyers) doesn't expect that a simple update which Apple is badgering them with will actually make their phone run worse. Oh and Apple do badger them, the update flashes up and makes one think that it NEEDS to be done.
True. But again, not all older iphones are getting slower to a crawl with iOS8... Plus, as i said, Apple is here to make money... In that line of thought it wouldn't make any logic to not speak of it's performance improvements and rather speak that it might slow down your device.
As for the update flashing up... That happens for the same reasons of the downgrading limitation... Money, fragmentation, user experience in the Apple Sandbox, development time, etc etc etc...
In my opinion (based on my experience), every device Apple supports on it's iOS's, run great or near... I notice some miliseconds of lag when performing specific things, but it's nothing nowhere near enough for me to complain about it.
