The most enlightening part of the article was in the comments where it was observed that given the length of time Postgres has been going, the number of talente

The most enlightening part of the article was in the comments where it was observed that given the length of time Postgres has been going, the number of talented developers who have worked on the project there are no easy enhancements or fixes left, just hard knotty problems. (paraphrasing). It's almost a mark of success of the project. There is obviously a lot of dedication too.