I don’t think Lucasfilm is marketing to purists. (And how much Disney supervises any of this is up for debate.) TFA’s financial success rests at least partly on bringing in the casual fans who grew up on the original films, even it if was the SE’s. The current films are tied into the events of the OT. Rebels is dealing with some of the aftermath of the Clone Wars.

Prequel toys are still being made. And unless things have changed fairly recently, prequel characters still appear in the theme parks.