Considering iOS 11 runs on devices soon to be 5 years old I don’t see much obsoleting.
some of those iOS devices can't run beyond iOS 9.3.5, and some people have not updated to iOS 11, still running iOS 10.
more importantly, with macOS High Sierra APFS issues, many Mac owners, some of whom could have purchased their Mac just 8 months ago, are still running macOS Sierra and may not update to High Sierra anytime soon. (I know this thread is about iOS

)
...(edit)... it seems like to gain full functionality with the newest features and products, they are dropping support for even last year's OS, which is a bit much, if you ask me. Not everyone updates to the latest OS, especially if it's buggy.
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Curious if they’ll ever update the remote app...
also when will this stupid iMovie app gain some basic functions from final cut...
which remote app, iTunes Remote or Apple TV Remote? update for what? for iPhone X full screen?
if iTunes Remote, I think they are done with it
if Apple TV Remote, yeah, it's overdue for X support
you'd think apple would update their apps for this first since they already asked developers to do so. They seem to be getting a bit out of sync lately.