> The debbie-downer perspective would be that for each additional qubit you add, you effectively double the cost of isolation from the environment, quantum erro

> The debbie-downer perspective would be that for each additional qubit you add, you effectively double the cost of isolation from the environment, quantum error correction schemes, etc. This is exactly my concern with quantum computing. Not only might it get more expensive but it may simply be limited by the laws of our universe. If the difficulty of entangling and isolating qbits increases exponentially with the number of bits then quantum computing could be a dead end. You may still get some nice results of you can decrease the exponent. I'd love to be proven wrong.