MPE also enables increased expressiveness that new kinds of multi-dimensional controllers such as the ROLI keyboards leverage (new kinds of MPE controllers are

MPE also enables increased expressiveness that new kinds of multi-dimensional controllers such as the ROLI keyboards leverage (new kinds of MPE controllers are shown at https://www.midi.org/midi-articles/midi-polyphonic-expression-mpe https://www.midi.org/midi-articles/midi-polyphonic-expressio...). While MPE is part of MIDI 1.0, many synth manufacturers never bothered to support it since their MIDI implementations were basically considered a "solved" problem by product management. Many of them never even bothered to support polyphonic after-touch except in their high-end keyboards. Now with MIDI 2.0 support becoming a 'checkbox' item for customers, all the manufacturers will need to revisit their MIDI implementations in upcoming product releases (some already have). I suspect many will use this as an opportunity to increase input dimensions and expressiveness - which is a very good thing for all of us users, even if they do so in ways which may have technically been possible before.