I mean, I'm a nerd so if someone made a solderless breadboard signing device I'd be all over it.

Anyway, thankfully for all of us, physical attacks can be mitigated outside of just having more secure hardware. You know we can do geo-dispursed multi-sig.

We call throw casino dice against a wall and enter our manually generated randomness into the wallet

We can just use simple air gaps.

And we can use firmware with the least amount of software to get the job done (no need for a multi-coin bloat wallet when all you need is a bitcoin signer)