We probably would, yes. But we couldn’t all be correct. Again, a game is D&D or it is not. It can’t be both at once.Of course it lies in multiple places at once. The line isn't an objective thing. It's subjective, which means that it will lie in many places simultaneously, depending on who all is trying to discern it.
I will lay good odds that if you, myself, @Oofta and @prabe (first other name I remembered ) all sat down and started changed D&D rules one by one towards Tunnels and Trolls, we'd find four different places where we felt the game switched from D&D to not D&D.