i used multiple dishwashers in multiple countries. blomberg, ge, bosch, miele, lg. used pods for as long as they exist (with exception of miele that has detergent cartridge that is good for two dozens of cycles). the only times when I had problem with dishwasher performance it's when either dishwasher had physical malfunction, dishwasher arms were blocked by some object or when i forgot to put pod.
is my experience of dishwashers extraordinary ?
His stance is less that pods don't perform, and more that powders perform just as well and are less wasteful.