I saw the posts, no clue if they had live sonar, won't comment on that.
Will say this....I stay away from the Fox and the Zoo that it has become on the musky opener. I love muskies and that is not even fun.
I saw 9 muskies on my one trip for muskies this year on Green Bay, in about two hours. I did not use livescope. I could have snagged every one of them in the mouth and/or face. They were post spawn and just sitting in shallow sand recovering. I put bucktails in front of their face hoping for reaction strikes. I dropped tubes in front of them and hopped them around those fish. Nothing. They hardly moved. Seemed wrong to me to bring a tube around their face and just set the hook. But that is ethics while fishing.
About live sonar? I have it. I'd happily turn it into an anchor if the State banned it. For me, it's added confidence in my spots and technique, for all species. And when I use it, I use it more to "scout" a spot, as opposed to see fish, cast to fish. Can say when I don't want to cast, it is fun to set that thing up and shoot areas and tell my wife where to cast. But when I do that, when I see fish (bass/walleyes), I note where they are and turn the scope 180 degrees away from them while my wife casts into the spot.