To some extent, there are some that do that.
The “felt piano” VSTs come to mind with their super exaggerated felt sounds, soft attacks, dreamy sonic ambience, and even added synth sounds. There’s been a number of these which have become super popular, and, may be a even better choice than an acoustic piano for certain genres of music, like “Lo-fi”, New Age, Meditation, and Modern Classical.
I actually consider keyboards and synths to be the keyboard equivalent of electric guitars, in how they’re based around many of the characteristics of pianos, but take things in a different direction that can actually seem authentic in a way that emulative sampling hasn’t.
Even Pianoteq seems to really win when it’s creating “new” or capturing lesser-known piano tones/timbres instead of attempting to capture name brand/well-known timbres.
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Also, I think that while no digital piano has a sound set that matches an acoustic, there are a lot of VSTs that come quite close. And I still don’t think there’s a VST out there that fully captures what VSTs are capable of.
I’d still love to see a company like VSL sample a more general piano, like a Steinway or Yamaha, in an acoustically treated room (to avoid room ambience and truly capture every aspect of an instrument’s sound), and sample both sustain and una corda with the same level of comprehensiveness with which they’ve done their previous pianos. I think that could be THEE VST that creates a new level of authenticity and immersion. And it’s possible now that we have the computers, processors and drives that could handle something like that, the microphones that could capture it, and the coding that the best VSTs makers use is pretty excellent now.
I’d also love to see digitals finally start using better sampling that what they come with, as that would help the close the gap much more. Instead of using four and five layer samples recorded in medium fidelity, they could do much better in terms of their sampling and really take digitals to a new level.
I’d love to see a digital running a native VST-level sound set. It doesn’t have to be VSL level, but it could be better than what it is.