I am with you two on the Junk fishing, it just takes me a bit longer to switch between techniques in some cases. For shallow water I generally have a slider rigged plastic snapped on (by choice because snap gives a better drop with slider head), Square bill rod, lipless rod, then maybe a musky rod. Depending on the bite the square bill or lipless rod may be a jerkbait. The bonus 5th rod will either be a spinnerbait or swim jig. If I need anything else lure wise, I switch it out on the rod it suits best. If I have the bite dialed in, I may go like 2 spinning rods and 1 multipurpose rod, all depends.
Not complaining as I love my boat, but it does force me to compromise. The flipside for me is since I either get locked in on one thing and zone out or want to constantly swap out lures, this really makes me focus and think out what I need so there is that plus. I probably have ADD or something. It also really makes me think about packing for vacation knowing the space in the boat is limited, which is a great cold weather project.
As far as vertical 3 is the max being that I am fishing from the front deck. With 2 casting musky lures with 7 foot rods, clear vertical deck space is a must. It is already tight quarters with two casting. A few bills have been buested bouncing off the console over the years. Could I maybe do another rod rack and get 6 in that spot, maybe. At this point I am so used to it it doesn't bother me. Most of my setups serve multiple purposes very well and I don't feel too held back.
That is why I was curious how everyone uses all those rods. Doesn't sound like anyone uses multiple setups just changing the line size keeping the lure the same.