Material You is a privacy issue. It gives a reason for people to have a custom wallpaper.Because of the WallpaperColors API, any third party app can use the wallpaper to generate a unique ID based on that
Samsung has that in Secure Folder. Hardware-based isolation.
it's completely proprietary tho (Samsung knox stuff is reaching scary levels of obfuscation and proprietary-ness in general)
It does. But it also means that if you want to reset the tracking you would need (for every app) to also clear the storage of the app and logging off and log back in with a different account before starting to use the app again
Material You: sets all the colours of your phone according to the colours of your wallpaper
Pywal: sets all the colours of your Linux desktop (terminal colours, GTK theme, config files derived from template files) according to the colours of your wallpaper
What I don't get is how often are people looking at their wallpapers? I see mine for a couple seconds before all the screen real estate gets taken by apps or monitoring etc.