The vast majority of WE wire out there is okay, but nothing that special. Wire pulled out of phone switchboards fall in this okay category. Some wire from the 1940’s and earlier do sound extraordinary, but this wire is quite rare. I heard such wire in comparison to Audio Note Sogon, and it was surprisingly competitive. I prefer Sogon for interconnects, but that stuff costs quite a bit.
We joke about having to wear gloves to handle the old WE wire, but caution is warranted. Some old wires were treated with arsenic to reduce damage from being eaten by vermin.