He didn't need to finish it in order for it to have an impact. Makers of FilePilot and Animal Well both attribute Handmade as being big inspirations for them to go the way they did. They said, they got the most value from the first 50 eps or so. You'll hear lots of them on the Wookash podcast.
Still, its completely ridiculous to rag on other programmers practices so much while you can't even finish your own project
Its like everything these guys rant about you could add on the tagline "...yet the world keeps spinning and we all keep shipping things"