I agree except for the part about further testing.
Amir has done an outstanding job of demonstrating that a cable included with a good hifi product and worth $45 on the secondary market is superior to a snake oil cable priced more than 40x higher. We can easily extrapolate that a $50k or $900k cable, if someone makes it, will not be any better than a properly executed generic cable that was bundled with a premium product 20 years ago. The cables over $100 have been crushed along these lines.
The remaining question for me, is , what about the $20 cable, the $5 cable and the measly $1 cable?
I know not to go above a 1999 Hitachi, but is that necessary, or beneficial, and if beneficial, by how much, compared to the cheapest cable from Monoprice, the slightly better cable from Monoprice / Amazon Basics etc.?