I don't keep tabs on how many Russian boomers etc., have gone by the wayside, e.g. simply cannot maintain, rusting away at docks, etc., but if our sub fleet has many less Russkies to track we just will keep these Chicom subs in check. Any of their subs get within the radius for their missiles to be effective, our hunters will be right on their ass.
I suspect we have their subs under tight observation. Easier to dump on one sub than a stack of incoming missiles (but we're working on that one too)!