Same here, can probably be ignored though which is hard for me because I hate warnings...

Just import SwiftUI in the file that needs @AppStorage support, no need to hold back on this convenient wrapper just because of older code, they can co-exist.

Responsible for this is ANECompilerService, have seen virtual RAM usage of over 407 GB right before crashing on an M1 Mac mini with 16gb of RAM. Crash pattern: slowing down opening a dialog to "Force Quit Applications" because I am running out of application memory (only Finder was running) freezing after a while, the pink/purple screen mentioned above + reboot