> my default assumption is it's still possible to not escrow recovery keys At least if you have an iCloud account attached to your profile (I have no idea what

> my default assumption is it's still possible to not escrow recovery keys At least if you have an iCloud account attached to your profile (I have no idea what happens if you don't), the upgrade process will automatically and without notification or asking consent add your recovery key to the iCloud Keychain. It does tell you afterwards what it so helpfully did.