For some time now I've been manually adding
/etc/default/grub whenever I install Manjaro. I find it very useful to have access to these shortcuts in the event something causes the system to freeze and I can't switch to a different TTY.
For example, if specific applications lock up the interface and you can't use the keyboard to switch TTY, you can use AltSysRqr to get control of the keyboard back, and then access a different TTY to kill hung processes. Additionally,
while not ideal, I much prefer a kernel sync + reboot (AltSysRqs followed by AltSysRqb) to yanking the power.
When you search for "reboot frozen linux" this is the first thing that comes up:
I think it would be ideal for these options to be available by default, instead of having to force power-off the computer and remembering to enable these manually before a(nother) freeze happens.
Obviously, ideally freezing wouldn't be an issue, but sometimes there's hardware/driver/software issues that are just not avoidable, and a small thing like this is a god-send in the event you run into it.