Anybody thinks they can play a real piano part without a sustain pedal is just kidding themselves. Just as you can't play a sax part without bending and scooping notes, guitar parts without hammer-ons and -offs, violin parts without legato and staccato notes, and an organ part without an expression pedal...

You might be playing the SOUND, but you are not playing the PART...

Just as it is painfully obvious to an old accordionist that someone playing an accordion sound isn't really getting it right, trust me, anyone playing a piano part without a sustain pedal isn't fooling anyone that KNOWS what a piano is supposed to sound like.

Just themselves...