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.
Just to be clear, it was always “finally” able to be sustainable - it just wasn’t profitable.
Now that they’ve saturated the market with makers they can “finally” keep the profits rolling with something that kills the planet less.