Skylake-EP and EX represent all new architectures built using the company’s 14-nanometer+ technology, while Cannon Lake-EP and EX were supposed to represent mild architectural enhancements of the Skylake-EP and EX chips, but with the benefit of being built on the company’s upcoming 10-nanometer chip manufacturing technology. Although I can’t make this prediction with 100% certainty, I strongly suspect that based on Intel’s most recent disclosures, Cannon Lake-EP and EX are dead.