As someone who does product design for a living and has used an iPad for almost 10 years now, I still get so confused with the Slide Over multitasking. There's no discoverability at all for this. You have to read the manual and memorize the gestures. Absolutely mind-blowing that they've made something this confusing.

I know when people say "it's like they don't even use their products" it is usually hyperbolic, but I don't know how they can explain the seemingly random continual prompting of Apple/iCloud login on OS X I see a few times a year.