Ubuntu has been regressing on the server side for a while. 1804 introduced netplan, a proprietary wrapper around systemd-networking. Going back to /etc/network/

Ubuntu has been regressing on the server side for a while. 1804 introduced netplan, a proprietary wrapper around systemd-networking. Going back to /etc/network/interfaces is an uphill struggle, but it is required for some functions. This time they've removed debian-installer, so it's no longer a matter of a new kernel/initrd/preseed file. On top of that, the automation has only appeared in the last few days.