Both needs each other as to what I'v concoluded when I researched this topic. Making the machine is one thing and using it for fabrication is different thing, it might sound naive to say so, since typically one might think generally of machines as they comes with manual, and that's all you need for opreation..etc, but that is really far from be the case for the EUV machines or the fabrication plants... Lastly, to add to the point, if it was only about the machine, why Intel haven't started using it for fabricating <7nm...