100%, and I have a ton of respect for how he thinks about work. While I can't bring myself to do the multiple FTE positions thing, I've spent half my career doing freelance/consulting work for multiple clients at once, and I love the mindset since I feel like it gets to the core of what "work" is.
In a lot of ways the "overemployment" thing comes down to treating full-time jobs like agency clients. Which I'm all for in theory and I'm a lot happier when I'm working with clients instead of employers. But I can't personally handle the dishonesty required.