This is where HW security keys may come in handy. Two or even three instances of such devices (hold exclusively for authorization purpose) would be more cost effective that the same quantity of Trezors. Besides having less electronic components ( no display and relating biasing circuits) HW security key is more reliable and will last a longer time. I have created a dedicated thread for them.
Keep reading if interested.Yes I agree. The authentication key is a device specially designed for this purpose, which will probably last several times longer than my Trezor. Moreover, if you very often use Trezor for authentication purposes, then for sure it will become unusable much faster than if it was used only as a wallet.