@epidiah I had just heard about that book from a @pluralistic review and was thinking about buying it. Glad you liked it. What did you find the most unexpected?
@epidiah I don't know if you figured this out on your own, but the Group Policy method described on this page has worked for me on multiple computers (Windows 11 Pro), have not tried the registry method https://www.howtogeek.com/disable-windows-copilot/