So much confusion around this topic out there. Not helped by the fact that there's distinction between Security Keys by Yubico and Yubikeys. Security Keys can't

So much confusion around this topic out there. Not helped by the fact that there's distinction between Security Keys by Yubico and Yubikeys. Security Keys can't do much other than FIDO2. Yubikeys on the other hand are split into old ones that did have smartcard functionality unlocked so you could upload your applets into and newer ones which are locked. Locked ones are only marginally easier to tamper with than proper smartcards, nearly impossible to be worth it for anyone than state actors. If you have any proof of it happening anywhere, then show me a source. Closest I have is this https://ninjalab.io/wp-content/uploads/2021/01/a_side_journey_to_titan.pdf https://ninjalab.io/wp-content/uploads/2021/01/a_side_journe..., which is about Google Titan aka reskinned FEITIAN ePass NFC with some functionality turned off