I for one love the idea and would gladly pay $20 for access. Chas is a great teacher so I have little doubt the quality of content will be spectacular.
The jury is still out, but the initial response has been pretty positive. To be clear, I'm certainly not working towards world domination on this one – really just scratching an itch, and maybe getting a(nother) fun side business in the process.
That said, I think there's actually a sizable latent market for software development tools and "aids" (trying to get out of the mindset that dev tools == IDEs here) that people will pay money for. No, people won't pay for yet another Eclipse plugin; slightly better code completion isn't going to move a needle anywhere. Part of that is due to the commoditization of such dev tooling, but part is also due to a lot of developers coming to realize that, in many ways and in many contexts, "dev tools" as we've known them really aren't the panacea of productivity that they were once thought to be.
On the other hand, produce development aids that really do move the needle – provide insight, accelerated deep understanding, better planning and estimation, etc – and you might have something that is actually valuable, and therefore a commercial interest.
Doesn't have to dominate the world to make enough money to make it worth the effort :). Especially since I doubt it will be insanely high maintenance.
Totally understandable on targeting non-standard parts of the developer ecosystem instead of doing the same old IDE/Bug Tracking and similar types of tools that are so popular for ways to monetize. Hell, if this took off wouldn't be surprised to see others try similar ideas for other languages.
This sounds great. I think this is a much better way of displaying documentation than the standard hierarchical text approach. It also makes it easier to spend a lot of time going down the rabbit hole and learning about new features that may have otherwise been very hard to find.