like i said, once i learned to spin at a higher cadence i could go farther, longer and consecutive days. i still mash but i save that for overpasses, sprinting to get into the left lane to turn, sprint away from dogs, catch up to the 80 year old guy on a rusty mountain bike that just past me, mash through the wind that has me going 9mph, catch up and try to pass the girl who just flew by me (yes ego thing), mash to not get caught at the red light.
its nice to save your legs during a ride to use when needed. it a balance that is available for you to use how you want to. dont over think it and just ride, have fun, then repeat.