The really silly part of this is that they're trying to reproduce the sound of something that doesn't extend beyond 5kHz. Worse, D-A conversion has real issues with the waveforms of distorted guitars. And most of the people playing these things are into the jar of bees rectum fryer sound. So now you have these extended bandwidth speakers trying to reproduce all the ugly artifacts of modelers. And using low end PA speakers with smiley disco eq curves, making it still worse.
Of course, I'm not the target market for this. Playing these things feels to me like the difference between playing a sampling keyboard vs. a real instrument. Yes, you have dynamic control and some degree of tone production, but it feels like remote control to me. I've sat with Robben Ford, plugged into his back up Dumble, trying to follow his hands and find how he gets the sound he does.