14 graphite layers have no particular properties of graphene anymore, it's normal graphite ink, consisting of graphite dispersed in polymer solution with ultrasound. That is not to say, such an ink cannot be useful, we just shouldn't abuse the conjuncturalist terms.

They space the ink out with a stabilizing polymer, ethyl cellulose to retain the graphene. However the resistivity of 4 mΩ·cm is 4x from competing with solid graphite's ~1 mΩ·cm.
So its not much of a triumph.

we now have an inexpensive and scalable path for exploiting these properties in real-world technologies.

Until printer companies get the rights to sell the ink.