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Android 12's app switcher now has a boring opaque background
At least the color still matches your home screen, sort of
Themes are a big part of Android 12, offering all-new ways for customizing your phone as much as you want. Unfortunately, there are a couple of places where it seems like Google has locked everyone into a single visual element. In Android 12 Beta 2, the Recent apps page has replaced your wallpaper with a new solid backdrop that uses Monet to pull colors from your wallpaper.
While maybe not the biggest change in Android N, Google announced a few interface changes to app switching that were particularly well-received during the I/O keynote. A couple of them had already popped up in the Developer Previews, but the keynote serves as confirmation that they will make it to the final builds. A change that is new to all of us is that there will be a reduction in the number of apps shown in the recent apps UI. Anything that hasn't been used "in a while" will be hidden from the user.