The article is aimed at a modern reader so uses modern terms. It's really no different to how we have terms like "classic rock" and "oldskool" when back then th

The article is aimed at a modern reader so uses modern terms. It's really no different to how we have terms like "classic rock" and "oldskool" when back then they were simply just "rock" and "house" music. If people are not familiar with your subject then you have to use language what is familiar.