Actually, human perception is incredibly good, though I agree prone to biases. But there are no double blind studies on this, so why dismiss experts' opinions so readily?

> Electronic keyboards have weighted keys and similar tactile feedback to regular acoustic pianos, so this is a solved problem.

For professionals, the difference is huge. Seriously massive, on even the most expensive electronic keyboards. This is why I replied (unusual for me) - saying "it's a solved problem" is so far off the mark