b
because it's clumsy and inconvenient?
it doesn't make much sense to me to design a hw wallet as easy to identify device while it's obvious that a killer form would be a no name Chinese brand sports watch that shows time, provides a couple of useless functions, has usb-c (obviously 😉) to recharge the device and a secret way to switch to firmware screen.... just as an example
traveling with well-know devices like ledger or trezor is as an op-sec risk growing every month and while passphrases and decoy wallets make it tolerable there is still plenty of work to be done to address this issue