You'll likely start using passkeys after upgrade without even realizing it. They do not eliminate your AppleID password, they augment it.With anything like this coming from Apple, especially security and cloud features, I always wait a long while before using it. Apple tends to mess things up a lot, and the users pay dearly for their mistakes. So things like iCloud Drive, iCloud Photos, 2FA, I had always waited a long time before activating. I haven't turned on e2e yet for the same reason. It will be at least a year or two before I consider using passkeys with Apple.