If you define a millennial as someone born from 1982-1996, the majority of those kids by the time the had a computer lab (say by the time they were in middle school) would have been too old for BASIC. You are talking 92-06, Windows 95 took over the majority market share by the end of '96, and you are forgetting a whole lot of schools had Apples being pumped in, so a lot less access to BASIC. Unless you were in a programming adjacent class, the majority of millennials weren't learning basic. Ask your non tech millenials how much BASIC they learned and they would look at you like you grew an extra arm.