Just a small note: it is not possible to unDRM books published post 2023 at this time. Amazon has changed their DRM scheme.
What is broken is that you can't use Kindle for PC/Mac to get AZW3 copies of books published on or after Jan. 3rd 2023 as it only lets you download with the latest version. As someone without a Kindle (and I'm certainly not buying one now) any new Kindle books would be locked down.
The only reason I chose Kindle over competitors was so that I could crack, and therefore own, the books I bought.
I guess I'll libgen it up now, and order deadtree from non-Amazon stores to support the authors.