Hey Joe I also disagree with your comment about the width and quality of lino & sheet vinyl.
The good heavy-duty sheet goods is available no wider than 6', can't make it wider cuz it's too heavy and too brittle. There are many good quality sheet vinyls that come 12' wide, but they do not compare to 'inlaid' goods.
In the real old days they used to install tarpaper over plank t&g subfloors. I've even seen newspaper used in a pinch.
Seams for linoleum and inlaid vinyls were usually made with an underscriber, although some guys would cut off excess and butt. Vinyl seams are overlapped, matched and double cut.
By the way......it's not louon, it's either luan or luaun, both are correct spelling but incorrect as far as using it for floors as you say.