
Google May 2026 bootloader update prevents rolling back
FYI from Google's factory images website (https://developers.google.com/android/images):
"Warning: The May 2026 update for Pixel 10, 10 Pro, 10 Pro XL and 10 Pro Fold devices contains a bootloader update that increments the anti-roll back version for the bootloader. This prevents the device from rolling back to previous vulnerable versions of the bootloader. After flashing the May 2026 update on these devices you won't be able to flash and boot older Android 16 build."