No block stream product is affected as far as I know. Only cold card devices.

Multivendor is the best setup. Unchained supports Trezor and Ledger as well. In some cases you can use other devices. Even if you had 2 cold card devices it’s not a panic situation. You should consider those keys compromised and sweep to a new vault.

If you’re still in single sig world, Cold Card or otherwise, please consider the upgrade to multisig. I worked on and recommend Unchained. Bitkey and Casa are also great options. Multisig with multiple hardware vendors is phenomenal security and easy to set up. These companies will hold your hand to make it easy for you. If you don’t want a corporate coordinator, BTC sessions has done excellent guides on Multisig setups with sparrow. Go to his YouTube channel. If you need time to consider all this and are on an affected cold card device, consider River and Stike as temporary custodial options. You’re not stupid for using single sig. You’d be shocked by the number OG’s affected by this. Every few years we get a reminder to harden our security posture. So take a deep breath and do the work!

These guys are nuts.

This is obviously correct. In the examples I gave that would not be the case with any of them. But good to point out!

No issues I’m aware of. I just have no personal experience with the product .

Less so than single Sig, and the attack vector is much more esoteric and difficult, but yes.

Trezor, Ledger, Foundation I would think. TBH I’m not familiar with the others like Jade, Bitbox etc…. Not leaving them out on purpose, just haven’t used them.