Why is it important to have an OD or Dist pedal that cleans up well? I never quite understood this. Seems to me if you want to revert to a cleaner tone you'd just bypass (turn off) the pedal. I can understand the concept with an amp, especially a single channel amp, to go from a crunch tone to a cleaner tone by rolling down the volume on the guitar. Is it just a matter of personal taste or the application in which the pedal is being used?