It gets complicated when central libraries like glibc have to be updated. I did this once with checkrestart on Debian Wheezy and I had to restart nearly everyth

It gets complicated when central libraries like glibc have to be updated. I did this once with checkrestart on Debian Wheezy and I had to restart nearly everything except for the init process. So in this case just restarting the system would have been faster and easier.