Correct me if im wrong, but that basically sounds like a button that automatically sells or buys at market price?
I hope it means they determined that 5 days to get BTC is ridiculous.
basically they are solving a problem that wasn't there with other ways of buying or selling bitcoin(i've never used coinbase, so i don't know if this 5 days of waiting, is true)
Yes, there is typically a 1 week delay for your funds to get from checking to Coinbase. I blame the fiat world for that. Credit card purchases could be done more or less instantly, I believe.