Not entirely true, the bulk of the investigation now has to wait till a Special Master is appointed, only those documents being reviewed now as to their potential threat to national security can be examined, the rest has to sit. Slows down the investigation
It is a delay tactic, and the Trump Judge cooperated as told. Next there will be another delay over who is the Special Master, both sides have to agree, and then the appeals upon appeals over the picked person, plus executive privilege and attorney client privilege. End game probably is to extend any exposure of the facts until after the 2024 campaigns, that way Trump can play the martyr role the lemmings swallow with hope of winning and ending the investigation