https://josem.co/the-beauty-of-finished-software/
I liked this article about Finished Software, and the WordStar example. That was from an era when online updates and patches weren't yet a Thing. Once you shipped that version, that was it.
My favorite Finished Software is As Easy As spreadsheet on DOS. Very solid, no issues.
But I'd say many DOS programs were that way too. What was your favorite Finished Software?