Why couldn't this also help with continuous-welded rail? Your own video points out that it's still prone to trade-offs: rail breaks in the cold are better than

Why couldn't this also help with continuous-welded rail? Your own video points out that it's still prone to trade-offs: rail breaks in the cold are better than buckling in the heat, but what if you could reduce the high point with white paint so you could expand the practical temperature range?