Quack System Upgrades

any of this crap:
http://www.machinadynamica.com/machina5.htm

or cocconutaudio.com

anything involving expensive interconnect would qualify

that rule to be imposed should be one has actually tried whatever they nominate in a valid listening comparison

yes, add the gizmos that levitate cables up above the floor

I've seen claims that the floor pushes static electricity into the cable

Again, the post above about poor electronic design is relevant...

and what about the snake oil around wooden equipment stands?

Finally, I am wondering how a $30,000 DAC makes things sound better

funny?  like a badly balanced motor that sounds like potato, potato?

or some other kind of funny?

Quantum Tunneling sounds like a tweak but is real...

no

Quantum Tunneling was recently demonstrated in semi-conductor devices beyond just diodes