exfil is not physical extraction, it is the leaking of your seedphrase when signing.
You got some more reading to do
Yes, I got my vocab wrong and I'll own that, but we're talking about this in context of a literal supply chain attack where a HWW had a circuit installed between the screen and the main board that leaked the private seed over another 2mm SIM circuit.
A permanently offline Thinkpad just isn't going to have that issue.
A permanently offline Thinkpad just isn't going to have that issue.