Agreed! Few people want the big Summit and even fewer actually need one. I'll bet that Weber sells fewer 670 Summits than Ranch Kettles? Personally, I think Weber ought to combine their three gas lines into one. I mean seriously, look at a Spirit 310 and a Genesis 310? What's the difference? Slightly bigger grill space - that's it! Look at a Genesis S-330 and a Summit S-420. What's the difference? An extra burner? Now there isn't even a side burner on the Genesis anymore. That was done to force you to step up to the Summit 420.
Weber should discontinue the Spirit 310 and 320 and the Genesis 310. They should move the side burner back to the Genesis 330 and discontinue the Summit 420 line. They should offer one 2 burner entry level Spirit, one 3 burner mid-line Genesis, and the Summit in 470 and 670 only.