John Varley was inspired by Heinlein and ended up writing a whole collection of books about a post-earth solar system where every planet had a planet-wide intelligence (among other Heinlein-inspired ideas).
The series (basically everything in the https://en.wikipedia.org/wiki/Eight_Worlds) is pretty dated but Varley definitely managed to include some ahead-of-his-time ideas. I really liked Ophiuchi Hotline and Equinoctial