Glad to hear that they took our advice, and enabled automatic firmware updates by default. We suggested this feature when we helped them fix the fax vulnerabilities (DEFCON 26 - What The FAX?!), happy to see they listened.
Despite using a VPN which forwards all of my network traffic on macOS, I can still access my printer's web server because of the automatically configured IPP-USB connection which provides a reverse proxy to the printer's embedded web server over USB. I haven't seen many articles detailing how this works and how it's secured...