I fail to see how this is an issue? regardless of it being Trezor or any other "BIP39" complaint hardware wallet.

So long as you remember your BIP39 mnemonic words you can recover your private keys and move funds even if there are changes OR your hardware wallet dies. There is half a dozen websites providing client side tools i.e. a single file (html + js) that you can keep on a USB (if you are paranoid that it wont be available in the future) that will derive your private keys from your BIP39 mnemonic (all done from the comfort of a old PC without a internet connection)

Need less of this scaremongering around here.

EDIT : Personally I use multiple hardware wallets with multisig ... get the best of both worlds + best security possible.