I went to Zipolite for the first time 40 years ago. Probably similar then to when you went 30 years ago.
There were only 3 palapas on the beach at that time...Felipa's, Lourdes', and Pancho's, who is no longer with us.
It doesn't even seem like the same place now! Can't even see the beach from the now paved road!
In fact, I don't consider it the same place, but I've grown to appreciate it, as it is now.
We live in Puerto Angel, and enjoy going to one of the many restaurant for dinner.