I can't disagree with most of what Andreas said, which I perceive to be advocating Bip32 HD wallets over single private keys stored on paper.  He does specifically endorse the use of a purpose-built hardware wallet over other methods of generating seed phrases.  

I do partially take issue with his statements about air-gapped PCs with open source OSs, however.  Again, he seemed to be specifically opposed to their use to generate single private keys for printing, he never specifically opposed their use for generating seed phrases.  Although I think using a properly air-gapped laptop/pc with an open-source OS is still quite safe, I tend to agree with Andreas that it takes a bit of technical know-how that could lead to mistakes by newbies.