In 1990 in was 20% asian, in 1980 in was 7%. The representation of the show is still realistic for one person's lifetime, in my opinion.

Indeed the creators of the show were full adults in 1980, a time when the USA was still nearly 100% white in most areas.

The tech giants that are the source of the major conflict in the show didn't exist as powerful anti consumer entities in 1980 either. You can't have one without the other.