We are losing a wealth of information, there have been many great answerers over the years, thank you all for your time & efforts.
Nowhere, I’m afraid, as there’s no such book.
You can request your own data if you wish. i.e. questions that you’ve personally responded to.
Yes, the Photography section remained one of the most sane and useful categories on here. Do a search and copy and paste the content you want. Do not attempt to make money from republishing it without the site owners written consent.
You can’t; you can only request your own data.