The mess is still there but only now one keeps the detritus of all of one's creative efforts, all the previous discarded attempts, silently gunked up in the recesses of the forgetful mind.
One would argue that version control might be sufficient to trace the evolution of ideas. But no. One would still miss the violence of the mind changes, of reckless scribbles or of reattempts that often take place in between the commits. Things are forever lost in the virtual trashcan and it's blunt implement, the backspace.