"Betamax was technically superior to VHS"
Surely that's the point of this museum. These aren't rubbish products, but they failed, and they failed for a reason, and we can learn something from that.
I find business failures of technically superior products to be absolutely fascinating and well worth studying. The Amiga and BeOS are two of my all-time favourite failures.
Betamax was technically superior to VHS, and was at the center of a Supreme Court case that ruled home recording to be fair use. It lost out to VHS in the marketplace for various reasons, so it's a good case study of a business failure for sure, but not because the product was bad or ill-conceived.