alt Hacker NewsPostgres and Redis are dramatically different projects with radically different stories, contributions and development team.
Virtually all major Redis features are a solo job of the post author.
By the way reviewers are paid good money for this and know the setup.
Oh wow, I didn't realize that Redis is still mostly just authored by antirez! (My understanding is that he had left for some time and then returned to the project.) That is, honestly, pretty amazing. Well, redis is great and clearly it's worked out.