The average millennial and younger don't use a non work computer, and haven't had one for 10 years.
And yeah, as a millennial I know lots of people who had a shared desktop at home, probably had a laptop in college, used a work laptop, and hasn't had a personal computing device outside an iPad and iPhone for a decade or more. Outside of those who play PC games or other niche hobbies it's getting more and more rare, at least for the people I know.
[1] - https://www.census.gov/newsroom/press-releases/2024/computer...