I'm getting errors whenever I visit, but was able to load the "mission" page earlier and see the format (though it also had errors; the center page didn't load at all). Seems like a great idea for explaining these sorts of things!
It doesn't seem to be caused by that, I've seen the error with and without the /birthday suffix. It looks to be related to missing data from one of the GraphQL responses.
There really isn't any technical details about this at all from what I read in the article or using the interactive tool. If this is a SaaS product for developers, wouldn't the actual "deep dive" I expected contain that? It's to high level and doesn't offer more value than some general blog telling me a few basics w/ some links to better content.
Did I miss something?
I think the interactive tool is a cool idea none the less.