Actually I find the best option to have a cold storage and not a hardware wallet, especially a closed source one. Convenience has its price and that price is unfortunately rising.
Just that hardware wallets support several altcoins unlike cold storage like airgapped devices. Aside that, no other convenience, like while making transaction. It is a good option for people that just want to be making use of bitcoin to go for airgapped device. No one would know if the device is actually a cold storage wallet or not. Hardware wallet that has an element of close source is worst, be it its software or secure element.