Years ago, I was stuck on a plane on the taxiway for 4 hrs due to thunderstorms in the city that was the destination. The airlines couldn't legally do that today. The limit is 3 hrs, Even 3 hours stuck on a plane on the ground shouldn't be allowed. If it's even 1 hour, they should deplane.

Hmmm try going Space A it might be days not hours

7 hour delay Dulles to Portland due to lightning storm and then crew hours. Airline played schedule catch up next morning by adding extra morning flight

Been delayed several times, over the years!