There's not a piece of technology from yesteryear that even comes close to seeing your bait and fish reactions in real time.
Remove FFS from Keith Carson's boat during that derby, does he still win based on the overwhelming power of down scan, side scan, GPS, 360, mapping, or any other technology you want to name?
My answer is easily no. He's had all those technologies minus maybe 360 in the past, why couldn't he utilize them for a win before now if they're all equally as powerful.
There isn't even an argument to be had that a significant population of fish in any given body is now being caught that were never caught in the past, there is only one piece of technology responsible for this, and that's FFS. You don't have O.H. Ivie with just mapping, 360, and traditional sonar. You can repeat that story time after time since FFS has come out.
I'm still supposed to believe that the A-Rig and Double Fluke Rig pose more of fair chase problem than live sonar 🤣