Now that I think about it, it's amazing that 1980's Nancy Drew ended up the way she did.
In the early 1980's, there was a huge legal battle over who owned the rights to Nancy Drew, the Hardy Boys and other book series. During the trial, it was revealed that Mildred Wirt Benson was the author of Nancy Drew; she wrote 23 of the first 30 books. She stopped writing books for the Nancy Drew publishers in 1954, but she still wrote for a living. Mostly newspaper stuff.
You know what I would have done, if I won the lawsuit? I would have immediately offered Mildred Wirt Benson a lucrative contract. Think about it. This was their big chance to get the original Nancy Drew author, back in the book-writing business! Also, it would have been extremely timely, as her secret identity as Caroyln Keene had just been revealed.
But, no. They decide to reboot the Nancy Drew franchise. And for whatever reason, Simon and Schuster hired a different company (Mega-Books) to do all the writing. You think they would have been more involved in milking their new cash cow, but no.
Today, none of the 1980's Nancy Drew books are in print. All of Mildred Wirt's Nancy Drew books are in print.