Know what's faster, cheaper and better? Paper wallets. I've never had an issue with my firmware from a live USB screwing up my security.
Inb4 Paper wallets can burn in a fire, you can lose them etc... Make three copies. Don't actually keep them on paper. Why not steel? Titanium? The answer is in your own head.
While I don't want to create an argument there is one thing not being considered by your approach.
Most Trezor users actually move and use BTC, perhaps even on their mobile phones etc..... A paper wallet has no hidden wallet feature. If I find the paper wallet its game over. If you find and grab one of my Trezors, and even if you can fully breach it (you won't), you will ONLY find the decoy "crumbs" I left just for that purpose. My real nest egg will be beyond your reach and you can't even prove it exists. Thats all thanks to BIP39 and features external to the hardware device.
Yep, precisely. The fact that you can use cold storage with the ease of a hot wallet is liberating. Using an airgapped computer to sign transactions gets old real fast. However that's just my humble opinion. Everyone has their own use cases and security needs.
Apart from that, rest assured that even knowing the seed words won't help an attacker if your passphrase is long enough. You could basically create a paperwallet that can be used on a non-airgapped device via trezor without fearing to expose the private key.