We can configure the opportunity status to include a specific number of days before the system starts flagging the Status Panel of the Opportunity Record.
It would be helpful to see the count of days in status as part of the Status Column in the Opportunity Lists as well as the warning icon if the count of days has exceeded the configuration.
I'd also love to see days left in status, because we have a multitude of status options for different categories of opportunities, and nobody can remember all the 'days' amounts off the top of their head. Knowing what's past due is fine, but it's more useful to know what coming up or soon to be past due.