Fuji quit coating their older emulsion, which was designed for optical enlarging. They are now re-packaging "digital" paper into boxes for us consumers, its the same paper that costco uses to print in their machines. The thinner base is so there is less chance of it jamming in the 1hr minilab machines. I've found that roller-transport processors usually don't like the thinner base materials, since they're more prone to twisting/tearing/buckling, etc...

I just wish Kodak made cut sheet Supra Endura... alas, nope...

-Dan