The team at the Android Open Source Project is working on a “Hibernation” feature that reduces the memory usage of apps you aren’t using. It is still in the early stages of development but is expected to roll out with Android 12, which as of writing this has yet to be announced.
Hibernation, as of writing, is said to clear up the app cache of a user in a multi-user device setting. Users have the option of choosing which apps hibernate and whether to do it for one user or for all users. What’s uncertain though is what Android will do if you decide to hibernate an app in a single user setup.
Not much else is known about the new feature but we’re interested to see how Android implements it and if it’s actually useful.