It went OK with my parents and iPad until my parents managed to delete Skype app. Holding the finger on the icon a little longer, then pressing it again and hitting the cross that appeared. Maybe even tapping OK afterwards. iOS should get a little better fitted mode to delete apps for "old or challenged people" (hint: not so easy to do). You show them how to tap, you don't show them how to delete apps as they will never needed, but they still accidentally enter the mode as it's just a longer hold on the icon.

Only programmers can like modes. Normal people die because of modes, two years ago one a computer in Airbus turned off "controlling with software" mode because some speedometer didn't get input, pilots didn't understand the effects of such mode change.

Modes bad. Not always having a clear "go level back" bad. And even if I haven't tested, I'm quite sure that anything non-Apple is even worse. Although I'd like to be proved wrong, it seems that nobody is even able not to just badly copy Apple.