Wrench is dead on the money with this one. I have a 958 up front and a 998 along with a HDS-5 on the console. They are just tools and aside from mapping/GPS, I'm honestly not sure any of them help me any more than the old Humminbird Super 60 flashers I used 30 years ago. My graphs primarily tell me how deep it is, the bottom contour/structure and whether shad/fish are present. In the winter, they tell me water temp.
Nothing, and I mean absolutely NOTHING, is of more value than knowledge and intuition, and those are gained only from time on the water. Can't buy 'em from JohnnyMart, Cabela's or Tackle Warehouse.
Some of the best electronics readers I know can hardly catch a fish, and it's a documented fact that drop shotting rarely produces winning sacks in tournaments. That goes for Aaron Martens, as well. Yes, he won AOY a couple of years back but he didn't win a single tournament that year. He had several second-place finishes back when the Classic was held in late summer, but some power fisherman always figured out a way to beat him.
Yes, electronics are important tools, but I'm in the same camp with Wrench when it comes to using your head over your computer. The more you know about fish and their habits, the more you'll catch. The more you know about electronics, the more seminars you can give at JohnnyMart (and they'll take about anyone with a Nitro jersey these days) while I'm on the lake fishing.