I mainly use press down on the screen's left side to invoke the app switcher, so that I can switch apps without using the home button. It's nicer for one-handed

I mainly use press down on the screen's left side to invoke the app switcher, so that I can switch apps without using the home button. It's nicer for one-handed use. Apart from that I haven't seen a compelling reason to use it -- even within first-party apps for example. EDIT -- I also use the keyboard trackpad thing. Not often though.