The kernel upgrade to 5.19.0 went amazingly smooth this evening with only one service (dovecot) not starting on one machine (mail) and that because a dovecot upgrade had overwritten my systemd start-up file so that it tried to start before all of the necessary file systems were mounted.

     There was also one virtual private server that failed to start two services but that was because the customer has an SSL certificate configured in but the certificate file was not present.