A useful analysis of Apple's announcements
Since this issue has deservedly earned a lot of attention from these forums, I think a few blog posts I've read will be of interest to others here. A security expert who runs an image analysis system and therefore already deals with CSAM reporting analyzed the statements made by Apple. A blog post from ten days ago reviews the technical details Apple released and how this compares to his own reporting mechanisms (spoiler, probably badly but they won't provide enough detail). A second post from this Monday reviews their announcements ever since (further spoiler, lots of contradictions but little new information). I found these informative, especially with the additional experience the author brings to the analysis.
For those who prefer cleartext URLs, the posts are published on the blog at https://hackerfactor.com/blog and are the two most recent posts at the time of writing. You probably want to read them in chronological order.