And access to Linux. Which most of non-tech people are not going to have.

Works on Android using Termux. libqrencode is a package in its default repo. From what I understand, Android is quite popular.

If the options for helping someone are sending them a URL or explaining how to install termux and then a new package and then running an obscure command in it, I know which option I would pick.

Thankfully, anyone on Android 10 and up already has sharing of wifi via we built in.

As should any of the new routers.

My new router came with the QR code stuck on. ios and apparently android have wifi sharing but its still going to be problem when an android user visits an ios user.

Fortunately, the two rarely comingle.