highway=scramble is a proposal which, if adopted, will make OSM distinctly better for its end-users in the space of a couple of months. If it isn’t adopted, then we will still be in the same situation two, six, 12 months from now, and people will still be falling off the side of mountains because their map told them to.
But I’m happy to come back to this thread in 12 months’ time to eat humble pie if one of the naysayers has managed to convince all the big data consumers. 