Reddit has taken over "abandoned" subreddits in the past and replaced the moderation teams. By making this temporary, the moderators of topic-based subreddits can continue to organize their communities, including organized migration to new places like Discord.
Subs are not some abstract things where you just slap a new mod on and it's all fine. You may be abke to do this in extreme cases but there is no way this works for thousands of subs
