This is quite exciting in that it removes plastic waste. I see no reason why different companies can’t make different shape ones to maintain their lock-in. I expect a knock-off market to pop-up, but that exists with plastic pods too. It’s a step in the right direction at least.
My ninja coffee maker is traditional drip but you can set it to cup mode and only put enough grounds for a cup. I used to have a super automatic but they are so hard to keep clean because the grounds go everywhere inside. But reusable kerug cups make no sense when you could have a drip machine with cup settings.