iOS7 was when I jumped ship
Like to think I was an early adopter of Apple kit - £1300 at educational discount for a Mac SE with twin floppies in 1987 on which to write my PhD thesis - but the forced iOS7 upgrade to my iPad was the last straw.
To be told in the Apple Store that I had no right to roll back to iOS6 despite having "bought" the hardware did things to my blood pressure that I really don't want to recall :-)
So now it's Android all the way - which means Google's own kit basically. I love to pick up last year's model on eBay just after the latest bit of bleeding edge tech is released. Nexus 6P phone does me very well thank you, even with Oreo.
Sorry to all the script kiddies out there, but I'm not willing to give up the last few decades of UI design for something that could be rendered on a 256 colour VGA adapter and looks like a 5 year old with a set of crayons designed it.
Which is one factor in why I'll be jumping from Windows 7 to Mint - don't even get me started on the abomination that is the Windows 10 UI!
(Lights blue touchpaper and retires)