There is a gigantic bedrock bowl beneath the great lakes that traps anything that falls on it. There isn't really anywhere for the water to go other than towards Niagara falls. Other basins probably have more groundwater absorption by comparison

This website doesn't have the most accurate take. Google also has a history of rolling tech they deprecate into existing products. They might "kill" a lot of products, but the tech behind them is often alive and well many years after the product is dead.