Certainly preferable to one metal back up.

Here's another thing to think about, though: Let's think of some of the things that steel protects against which paper won't - catastrophic fires, corrosion, etc. If my house has suffered some kind of devastating fire or explosion, or is now underwater, or has somehow had gallons of a corrosive substance dumped on to it, which of the following is more likely? I spend potentially days manually sifting through rubble and debris looking for my back up, or I simply go and retrieve my second back up? I might not even be allowed to enter the area due to safety concerns, or indeed able to enter the area if there is severe flooding, for example. Hell, maybe I want my back up to be destroyed so it doesn't wash up on a street somewhere for someone else to find or be found by a first responder.

It's all about your individual threat model, but paper back ups work just fine for me.

Don't use Google is the first step here, since it allows scammers to pay to boost their sites to the the top of your search results. But also, download it from GitHub and verify it against the hashes provided which are signed with Ian Coleman's PGP key.