The crazy thing about all the electronic toys available to newbie fisher persons is that after a season of talking advantage of and having the ability to use it properly they can attain several years of experience in a few weeks. People don't have the time or ability to spend their lives on a few bodies of water to learn it. Before we got our own sonar in the late 70's we generally went to 3 different areas for our 2 weeks of fishing, spring and fall. The Ottawa, Nipissing south shore and Big Island on the Bay of Quinte. And in those 3 areas we didn't venture far from our local spots until we got sonar. I remember one afternoon my Uncle insisted on heading east from our spot on Nipissing. I warned him that after 8 years fishing at the in-laws cottage for a few days in summer we never ventured far from our regular areas. It took the 4 of us a few hours to get his old 20 foot wooden lapstrake off the shoal we came to rest on after it took a huge gouge out of the keel stem to stern. I didn't know how heavy those old wooden barges were, I did after that day, heavy, really heavy. Our GPS was our arms outstretched to line up the blue cottage with Hollywood Beach for Smallmouth. Start our troll at the burning bush until we got to the Osprey nest, landmarks were our GPC co ordinates, I'm sure they were yours as well. Fishing Lake Erie or Ontario, forget about it. But the stacks at Nanticoke helped a bit when they built the Hydro plant. The old joke then was to answer "Strait off dem dere stacks brudder, straight off dem stacks" When someone asked where did you get dem beauties? We still tell them the same thing and they took down the stacks 2 winters ago. When we hit the fish we earned it the old fashioned way, by working hard. I have a couple of thousand bucks worth of electronics on my boat now (don't want to add it up), and still get kyboshed by the good old Skunk Gods.
edit: by the time you get the new gadget out of the box it's outdated.