Yes, digital pianos have value.

Stephen Hough’s blog — looks like the truth is a little more complex than what insecure amateurs would believe. And it also appears that a pro who has no reason to be insecure, and who actually does this for a living, is more able to see their value.

A fave quote: “… the Avant Grand (you can read all about it here) which is better than almost any upright and than a good many grands.”