I upvoted you because your first sentence is a useful observation, but I'm having a hard time using any of that to justify throwing away a wifi adapter. Even if it were possible to fingerprint the adapter beyond its MAC address, there's no global database of whitehat pentester wifi adapter fingerprints, and such a thing would be worthless anyway. You're not going trigger countermeasures by reusing a wifi adapter. The only threat model that remotely makes sense for that kind of precaution is fear of nation-state level resources trying to identify and catch you. And that's well outside of the realm of "pentesting".

(And the idea of accidentally exfiltrating data through a reused wifi adapter is ludicrous)