There aren't enough competent people around, and even fewer who prefer the same workflow as the original author.
What really happens if you open up the code base: Mediocre people who want something for their resume flock to it, work on unimportant issues, add bloat, CoCs and generally make your life hell.
What really happens if you open up the code base: Mediocre people who want something for their resume flock to it, work on unimportant issues, add bloat, CoCs and generally make your life hell.