Set systemd-boot Default to LTS?

I remember when Cassini/dracut came out I wanted to modify my system to be as the latest release. Convert to systemd-boot with dracut?

I remember I only changed /added timeout to “see” the boot menu of systemd-boot (as shown in the thread.
I do not not even know what is # console-mode keep, should I un-comment it? what does it do?