Mike Micheletti recently wrote in EDN about USB power delivery:
" The USB developer community working on PD (Power Delivery) technology couldn't agree more. The PD introduction has created a surge in development from OEMs eager to drive the next wave of USB innovation. Yet, a storm of bad publicity for USB Type-C and PD erupted after several reports of damage from poorly designed USB Type-C cable implementations. Amazon's well publicized decision to ban non-certified USB Type-C cables has underscored the importance of compliance testing for USB products. This has led to a new focus on certification for USB Type-C and PD."