Seedsigner is awesome but managing seed QRs cards is not really practical for most people. I don't see it as a cold storage solution personally. And yes I built one and use it.
Discussion
Seedsigner is not a cold storage solution, it’s a signing device. In your instance, the seedQR is one part of the storage solution. What medium it’s imprinted on, where you keep it, how you access it, and when it’s accessible are other components of that storage solution.
Right, I understand. The problem is it only really makes sense in a multisig setup. Why would I want single sig QR codes laying around with my seed phrase, just another thing to have to secure. But a multisig wallet with a Seedsigner as one of the keys makes sense. Problem is most people can't set up a 2FA on Coinbase let alone a 2 of 3 multisig with a watch only wallet.
Unless you delete the key from your coldcard, you’re already leaving your naked singlesig laying around and have a second item to secure.
So my Coldcard gets stolen along with my Seedsigner and seed QR code. Which offers more protection in a single sig wallet in this situation? The Seedsigner? Lol.
Whataboutism is a lose/lose game. Thief beats your ass or worse until you give up the pin is the likely scenario there.
Trade offs, all the way down.