The counter top ones take up a lot of space, and you cannot use your kitchen sink while it is running because it connects to your kitchen faucet. Which also means you need to have the correct kind of faucet for the attachment to fit. Also, dishwashers use a lot of power. There are hidden costs at play here, and with the price of power only going up, why wouldn’t I do dishes the cheap way? Not to mention haveing to buy dishwasher tablets and all the waste products created by the single use packaging.