I like how Jermey blends the old and new together. Readers are introduced and shown how techniques as old as the web (like progressive enhancement) are still useful today and perhaps even more useful than they have ever been. But this isn’t a history novel. New technology (like service workers) is handled with equal grace, and modern techniques for performance gains are given the credit they are due (like build tools and code splitting).
As an aside here — have you ever had an inkling to write a tech book? I have both heard and given this advice: Write a blog post first, or maybe a whole bunch of blog posts. That’ll prove you clearly have words to say about this. Plus it will get the energy of your idea into the world. You might get feedback and constructive insights on the idea as it is shared. Then, hopefully, you can turn that blog post into a talk. That’ll really get you thinking deeply about your idea while getting even more comfortable with the idea of sharing it clearly. And, if all goes well, turn all of that into a book!