Many people would say their car could never have too much gas mileage or their house could never be too large. On a similar note, many oscilloscope users would say their scope could never have too much acquisition memory. But, just like there are tradeoffs in gas mileage (less acceleration for example) or in the size of your house (more costs to heat/cool), depending on your oscilloscope architecture there may be very real tradeoffs in more acquisition memory.
