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"Efficient" as in "kills apps immediately as soon as they are put in background" so that I constantly lose context in apps when multitasking

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Even my "ancient" iPhone X does it so rarely, I don't lose any context. Even if it's happening more frequently than I notice, the apps also restore their contents.

macOS supports context restoration for 7-8 years now at least. iOS has inherited that soon after, so any application "killed", they SHOULD return to the state they exited, given they are implemented correctly.

Pretty sure they just use compressed memory and swap for apps that haven't been used in a while, similar to macOS.

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