its not just for crappie. ice fishermen and salmon/trout trollers have been using panoptix since the first gen ps21 and ps30's were released almost 10 years ago.
i dont have a problem with it bought the first ps21 and then garmin pissed me off with the lvs32 and requiring a new mfd.
im not really worried about depleting the fishing resource as fisheries biologists will adjust the limits as new data is studied. the popular saying nowadays is "you cant make em bite". i can guarantee that there are several on a lake that day that can make them bite.
the couple of problems i have is in "pro" fishing. lets me honest with ourselves, its made of joes into pros.
the second thing is all these "products" these bait companies, battery companies, supply comlanies etc. using FFS to sell products that wont ever work and will possibly damage their equipment, pretty much fleecing folks of their hard earned money.