There are currently 18,193 questions on Stack Overflow with the [cron]cron tag. Are questions about cron/crontab topical for Stack Overflow, or should they be redirected to another site such as SuperuserSuper User or Unix & Linux? (Both sites have their own [cron] tags with a fair number of existing questions.)
A weak argument in favor of keeping them on Stack Overflow is that cron implements a tiny programming language. A stronger argument IMHO is sheer inertia. The counterargument is that such questions are about using software, not about writing it.