Site creator here! Thanks to all who spent some time reading and scrolling through. I’m happy to see such great discussion here, and gives me some confidence the excerpts pulled were the right ones to get the core ideas across.
Your site is a great summary reminder of the key points and it brought me back into the experience of reading the book.
For folks reading this, I do recommend reading the book since the website is just a taste of the book. It's lessons may hit different not having gone through the full journey.
Thanks again for making the tribute!
I have to scroll over 30 years back in time by months.
In an attempt for simplicity I used a simple <input type=date> field which means it uses your OS or browser’s native date picker. As a Mac/iOS user I’m pretty familiar with those, but I’ll admit I did not test this across Windows or Android devices which apparently have not done a great job at this UI element.