Comment 2 for bug 1763608

"there is no usefulness in having a network device listed in the file without any configuration, as you can always just do "ip link set $device up" to bring it up"

Following this argument, there is no usefulness having netplan at all as you can always configure an interface using ip command line tool.

The main point of such configuration tool is to automate network configuration at boot time. And sometime, a system need to have its interfaces up to run properly, even if they are not configured (OpenVSwitch for instance).