What is the consequence of resolving a default action after a trigger is missed?

The consequence of resolving a default action after a trigger is missed primarily involves legalizing any illegal actions currently on the stack. In Magic: The Gathering, when a player misses a mandatory trigger, the game recognizes that the trigger was not appropriately followed. The default action allows for the normalization of the game state by rectifying any discrepancies caused by that oversight.

When the missed trigger is acknowledged and resolved, the game allows illegal actions that were taken due to the missed trigger to be made legal. This means that rather than unwinding all actions taken in the game, or rewinding the game state, the game looks to maintain the continuity and integrity of the current situation while adapting to the missed trigger. Furthermore, acknowledging a missed trigger does not allow for undoing previous game actions on the stack; instead, it ensures that players can continue the game from its current state while accounting for the oversight.

Understanding this allows players and judges to maintain the flow of the game and minimize unnecessary reversals or rewinds, fostering a smoother gaming experience.