It's only outlived it's usefulness to you, buddy. It makes my point quite clearly. Corporatist corruption is running our economy into the ground, and some of its grotesque manifestations can be seen in its manipulation of government to favor obsolete technology like gas. As a result truly efficient technology like solar, wind and high speed rail fall by the wayside. Once again, this is not the result of a free market, or a semi-free market, but a totally corrupt market. That's the fire.
Now, it is a compromise on libertarian principles to use tax money for a high speed rail system, but minarchy itself is a compromise. If you are not willing to compromise on the noncoercion principle then you are an anarcho-capitalist, not a minarchist. If you are are minarchist, then you are necessarily a compromiser. Now that that's out of the way, we can see that rationally, a 10 billion or so investment in high speed rail is nothing compared to the trillions that corporatists thugs loot every year from us. If we can fight back using the fire of government to get high speed rail, it is a net gain for liberty.