Ever jump onto a Unix system to help resolve a critical problem and find that the information you most want to see in your ps output has run off the right edge of your terminal window? Who hasn’t?
$ ps -ejH PID PGID SID TTY TIME CMD ... 1396 1396 1396 ? 00:00:00 sshd 28281 28281 28281 ? 00:00:00 sshd 28409 28281 28281 ? 00:00:00 sshd 28410 28410 28410 pts/0 00:00:00 bash 30968 30968 28410 pts/0 ...