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.
You should check out getting an Aeropress. They’re cheap, easy to use, and fast.
French presses also make good coffee on the cheap, but I find it is a bit harder to tune in and get going. I got a generic press for about 30$, but they are annoying to clean.
If you are willing to spend 100-200$ on a good grinder you will get really good consistent grinds with minimal effort.