PC costs certainly aren't helping, but there's an entire cross-section of income and age demographics whose only computing device is and has always only been their phones.

I was curious so I looked it up. This site suggests 1 in 7 households in the US "either lack a computer at home or rely solely on a smartphone for internet access", heavily weighted to lower-income states like Mississippi, West Virginia, Arkansas and Louisiana: https://www.benton.org/blog/computer-ownership-and-digital-divide