Well, here I am deep into RU-vid and this wonderful piece has garnered 349 views in seven years. Welcome to classical music oblivion. What does this tell us about the state of culture in the digital age?
Having such control over resonance sounds amazing but my place is tiny and doesn't have enough room for a grand piano. Its sad that the sostenuto pedal is used so rarely to the point that upright pianos don't even bother having it. I've heard that only a handful of uprights have true sostenuto but I've never actually seen one. The mechanism would definitely need to be more complex on an upright due to the orientation of the key action and strings but I'd like to give a shot at making that possible one of these days.