if i switched away from Macs, i think i would be more likely to switch away from iPhone.. which, thinking about it now, i haven't ever considered doing before..
I've considered both for different reasons.
If my trusty old 4,1>5,1 kicks the bucket and the 7,1 is reality, I'll do a price comparison, and if the equivalent-spec Windows workstations really are significantly cheaper, I may switch. Most of my software is cross-platform, and I'm sure there are alternatives for the stuff that isn't.
I love the iPhone, but I'd consider an Android phone on the strength of Google Maps and Voice. Gmaps has effectively replaced my in-dash navigation, and its voice recognition is way ahead of Siri.
Apple Carplay looks cool, but being restricted to Apple Maps and Siri is gonna be a PITA. It'd be inconvenient to let Apple Music and podcasts go, but I'd just replace the former with Spotify and surely there must be a unified podcast app for Android as well.
I have two 3rd-gen Apple TV's that I love, but no way in hell would I pay $150+ for the current gens. I have an old Roku2, and it was fine; I'd happily buy a newer model to replace my AppleTV's when the time comes.
My 2015 MacBookPro is a solid little computer, but I can't see myself buying one of the new models; no magsafe, uncomfortable QWERTY, and much more expensive. Not to mention all the adapters I'd need to connect stuff (for now).
Which leaves me with the one Apple product I would not want to replace with anything else: my 4th-gen iPad. It won't run iOS11 and when my critical apps are no longer supported on iOS10 I will get a 10.5" iPadPro. It's remarkable how much of my generic computing needs are met by the iPad. It still sucks for select/copy/paste large chunks of text, but for the most part it is just really good. The clumsy text selection is offset somewhat by the built-in LTE, superior battery life and portability.
Now, if Apple made a new MacBookAir with cellular capability, I may feel differently, but as it is, the iPad is good enough at most things for me to make peace with the things it doesn't do well.