Are WA-Quantum Chips even sold anymore?

Cable Co. among others sells the WA chips. The rumpus sure has died down, though, you're right. My theory is it's pretty easy to saturate the market since there are only so many audiophiles. ;-)

I think sometimes they helped a lot. In particular I liked them on fuses. On speakers I found them to vary greatly, including harming the sound on some.

I have a bunch. Semiconductor chips, cable chips, inductor/coil chips, small and large capacitor chips. Fuse chip. What have you.