I am getting tired installing manually required extensions manually. I was wondering if we might want to add option to CREATE SEQUENCE that would allow automatic creation of the extensions required by the extension that is being installed by the user.
I also wrote some prototype patch that implements this.
I call it prototype mainly because the syntax (CREATE EXTENSION ... RECURSIVE) could be improved, I originally wanted to do something like INCLUDING DEPENDENCIES but that need news (unreserved) keyword and I don't think it's worth it, plus it's wordy.