There is criticism about digital pianos because it seems the real expectation is that the goal of the digital piano is to accurately emulate a "real" acoustic piano in all its aspects from a player's perspective, rather than being its own new instrument - the digital piano.
There seem to be quite a number of very discerning players who, for various reasons, can't have an acoustic piano and therefore must settle for a digital instrument. Such players here who have BOTH a digital and an acoustic, and use them each as appropriate, seem to fare better.
I am new to the piano, but have been playing jazz and fingerstyle guitar for many years, so I know the amount of isolated time and effort one must put into mastering one's instrument of choice.
Those who play piano well have obviously spent countless hours alone perfecting all aspects of their playing. It really must be frustrating for these people to have to reap the reward of all that work on a digital piano as a compromise, especially knowing what they could do on a "real" piano. I am certainly discovering how much effort it is taking to get anywhere on my instrument, and therefore have extra high regard for the recordings I have heard from people here.
Even the V-Piano seems, from reading here, to be well short of the ideal for this type of player. I have to say that I am truly grateful to not have that burden, so I can really enjoy my digital piano. The hours I put in are on a digital piano, so I will probably never develop the discerning ear and sense of touch on a good quality acoustic from which to make comparisons to what a digital piano "should" be.
I am not being facetious here. I truly mean what I am saying, and I don't believe those accomplished players expressing their dissatisfaction with digital pianos are being unnecessarily "bitchy" about it at all. Playing the guitar, I am extremely fortunate that I can have a very fine handmade acoustic instrument for less than $10,000, and have it my home regardless of where and how big the home is, or how close the neighbors may be.
In the guitar world, the electric guitar is considered a completely different instrument from an acoustic, so both are considered "valid" for a skilled player. I tend to prefer the acoustic guitar, both to play and to listen to, but for the electric player, what s/he is doing is considered entirely valid, rather than being an attempted emulation of the "real thing".
To me, the current state of the digital piano overall is wonderful and I would be happy with most of what is available, and I am sure it will only continue to improve in the future. But for somebody whose skill and level of discernment can only be satisfied by a fine acoustic, I can see where this may not be the case. Here's hoping for them that the time comes when this is no longer true, and that this accomplishment comes at an affordable level.