Or if they had an answer, they paywalled it, until Google got pissed at them for including the answer in their SEO but blocking it once the user clicked through. Then they maliciously complied with Google’s demand to not censor by burying the answer under layers upon layers of ads and other “related” questions.

I was so glad to see SO eat their lunch.

Likely the same reason why banks and other financial institutions still use COBOL and Fortran code written in the 1970s or earlier on archaic mainframes: Top management decided at some point it was too expensive to rewrite everything from scratch in some modern language for modern hardware, so they just limp along with what they have.

A 16-bit app written for Windows 3.x would almost certainly have to be rewritten for modern, 64-bit Windows.