He's an old-school hacker in the best sense of the term. Living in an off-grid cabin in the Oregon mountains, programming the Apple Writer, flying down to Cupertino on a little private airplane with his bicycle in the back. Much underappreciated but I suppose he prefers it that way, staying low key. Respect.
He was my idol when I was young. He made $1M writing the first word processor for the Apple II. And he did it in a cabin in the woods. When done he walked in to Apple and handed them a floppy with the code.