seems like it's proprietary hardware

Our signature multisig setup involves daisy-chained devices for a fantastic user experience during key generation.

This dual usb-c port daisy-chaining requires custom hardware.

You can flash onto off-the-shelf esp-32 if you so desire.

It's not air gapped.

Airgapping is overrated, a good overview here:
https://bitbox.swiss/blog/does-airgap-make-bitcoin-hardware-wallets-more-secure/

Think about how interactive keygen can verifiably includes randomness from multiple devices:

• You don't need to trust that your device generates secure randomness
• You don't need to trust that your device uses that randomness
• You don't need to trust that your devices display addresses derived from that randomness

frostsnap achieves these with a simple UX.

What will happen if you lose one of those devices? RIP your coins.

Not even close, it's a t-of-n threshold multisig.
If you create a 3-of-5 you can lose up to two devices.

Each device has a backup.
So even if you lose one, just restore it from your backup.

Why waste your sats on this when you can just write the keys down on a piece of paper?

I'd love to hear your trustless setup that non-technical people can carry out securely.
(frostsnap is it)