I really dont think so. There are items where it will make sense more than others. Assemblers, sure. Inserters? No way. Power poles?.....maybe. this is a self limiting system. Nobody says you need an entirely legendary base from belts to assemblers.
Actually, inserters or even power poles make sense.You need to realize that quality is a multiplicator of price, so if something is cheap to begin with, making more quality version of it is way more affordable (lab is a great example), while making legendary spidertrons and such, that is where the craziness starts ...