Designed by Apple in California book
That’s it.
If you are like me and a few days ago – noticed that you were getting prompted for your passphrase when using your SSH keys (instead of using the keychain) – here is how you can make a small change to no longer enter your password each time: http://apple.stackexchange.com/questions/254468/macos-sierra-doesn-t-seem-to-remember-ssh-keys-between-reboots/264974#264974