The 'most' there is doing some effort
It is actually quite a common practice for those being audited for disaster recovery to do exactly that -- yank cables. More realistically, flip some switches
We do it once a year, set aside a region and time... then test our processes
It serves a few purposes, most importantly -- are our services fault tolerant, and can we bring them back?
I think it's reasonable to trap the signals and make a best effort basis, knowing that PID 1 (or the environment) will eventually have to SIGKILL you -- ready or not
Just because we can't save all of the state doesn't mean we shouldn't try
