If you take the West Seattle Bridge straight to 1st Avenue South, or I-5, you might not care much about the endless Viaduct dithering. Same if you telecommute. But for the thousands of us who rely on that crumbling concrete lifeline along the waterfront, its looming doom is a matter we ponder daily, if only for the moments we roar along its deck, praying The Big One won’t strike until we are safely off it. Lately the discussion has focused on “tunnel vs. New Viaduct,” but this weekend, an editorial threw in an alternative viewpoint — why not just tear it down and stop there? Intriguing, especially if truly usable water transport could be mustered (for example, foot ferries not just from the Water Taxi jumping-off-point vicinity at Seacrest, but also from Fauntleroy, for the south end of our peninsula) — but does it have the proverbial snowball’s chance?