I can see these 2 CSAM features eventually arriving.
- Messages: Given that it is opt-in and affecting only children and teenagers, I think most parents would applaud CSAM warning coming to Messages app.
- Siri and Spotlight: Likewise, CSAM disclaimer on the search results is also non invasive and therefore harmless.
But as for controversial CSAM change to
iCloud Photos Library, I think Apple got the message and if it ever returns, it would be drastically different. My guess is server-side CSAM detection much like Google's, and I am guessing some governments (e.g., EU) will mandate it.