I used iPhones right up to the introduction of the 7. Then I moved to Android. I have a Mac desktop and used to have a Mac laptop (had a detour to the Surface Pro 4 - which will soon be rectified with a new MacBook..!).
I have found that I simply don't much care what system my phone runs but I do care a great deal what system my computers run. I find Windows to be truly the spawn of Satan (as my Windows 10 Surface has reminded me) and simply cannot live with it when compared to the bliss of OS X.
However I have not noticed any such issues with the phone. I can get Apple Music, iCloud and so on on Android, I can get my mail. I can play games, I can use Google apps like photos and so on, I can use Dropbox etc etc etc.
My wife has an iPhone 7+ and she hates it. Her complaints are a bit vague but seem to generally involve the home 'button' which is not a button and the 3 D force touch on the screen that opens things she does not want to open.
Wearable wise I have a Samsung Gear Frontier. It's not bad, but I do not really see the advantage in wearables. I have almost all the notifications off (as I do on my phone, with only email and SMS turned on there) otherwise it just irritates me. It's occasionally useful - turning the phone alarm off in bed, answering calls sometimes if the phone is too far away - but really just a gimmick in my view.
Presently have a Galaxy S8+ which I like; might swap it for a Note 8 if the reviews are good. Probably won't.