What is the present-day measure for the Prophet's (peace be upon him) excuse for spending the night outside Mina for the water-carriers and others?

The Prophet, peace and blessings be upon him, granted permission to Al-Abbas and those tasked with serving the pilgrims, such as doctors and firefighters, to forego staying overnight in Mina. As for those with specific excuses, such as the sick, scholars have differed on whether they should be included with those to whom the Prophet, peace and blessings be upon him, granted permission. What seems most probable is that they should be included, because the permission granted to Al-Abbas indicates that staying overnight in Mina is not an absolute obligation.