The Sony z series RJ45 hinge was just a bad design. Having used other brands that have this style port specifically the Dell latitude 7490 they function much be

The Sony z series RJ45 hinge was just a bad design. Having used other brands that have this style port specifically the Dell latitude 7490 they function much better. Dell will likely continue to have a laptops with dedicated rj45 ports for a long time at least on business models.