It's not present on most machines? All Linux boxes I've seen used systemd. It's the most used init system. If you want to say that there are machines that don'

It's not present on most machines? All Linux boxes I've seen used systemd. It's the most used init system. If you want to say that there are machines that don't have systemd which therefore cannot use quadlets, that's like arguing that something made for Linux is useless because "Linux is not present on most machines".