Thank you for the great feedback! This is one of the benefits of undertaking a project such as this in the open. I hear you with the <base> element. I was in two minds whether I should even include it. I am thinking now that I should, but introduce it merely for completeness and recommend not using it. I wonder if it will ever be deprecated.

Thank you for the feedback. I am also reading through the spec as a core part of writing the book. It is indeed critical to do so.

100% Agree

This is very interesting. I agree that some of the formatting puzzled me as well. I would assume this follows some standard even when the use of said standard is uncommon. I have for example not seen 1.000,00 € used, but I thought that perhaps if you live in Germany, France, or another EU country then it is common.

Mine is a Macbook Pro 2013 with a Broadcom wireless device.

I do not have much, if anything to add, other than saying, "What @silas@programming.dev said." - Great advice.