The final oral arguments mark the culmination of the evidence and argument phase of a case.
generally a plaintiff cannot file a counter to the defendant's written arguments after their own final oral arguments have been presented, as the stage for presenting arguments and evidence is usually considered closed by then.
Besides the plaintiff generally cannot file a reply to the defendant's written arguments after oral arguments have concluded, as this is typically not permitted under the Code of Civil Procedure. Once oral arguments are delivered, the case moves toward judgment, and the court's focus shifts to resolving the case based on the arguments already presented. However, the court has the discretion to allow such a filing if it deems it necessary, though this is an exception rather than the rule.