[viraptor]

Be careful with "there were 15% of adults in the US who said they only have smartphone data for Internet access" - it means that's how they get the internet, not where they use it. Due to broadband availability / quality there's going to be a non-trivial number of people relying on tethering either through phone or dedicated dongle.

[InitialLastName]

At this point, I know a non-negligible number of middle- and working-class adults who don't have a general-purpose computer in their household, purely because they don't need one. I've never thought to ask how they were doing their taxes; presumably they are outsourcing it, going to a library, or doing it on their phones.