Parkinson's Law of builds. "work expands so as to fill the time available for its completion", or in this case the available time is the point at which people can't stand the build taking too long. 30-60 minutes is normal because anything > 1 minute required you to context-switch anyway, and > 60 minutes means you are now at risk of taking a day if you have a work queue of a 1-pizza team. So [1..60] range causes a grumble but nothing will be done.
