Even though a process can be run concurrently, it doesn’t mean you necessarily want to. Besides that, your cron itself may be something like “do-something | gre

Even though a process can be run concurrently, it doesn’t mean you necessarily want to. Besides that, your cron itself may be something like “do-something | grep foo > /root/bar”. You obviously don’t want to run that concurrently. You could create a script, but that’s more cumbersome.