Apple already did roll out changes like this, without disclosure. They've been scanning your Emails like this without your knowledge for years, if it makes you feel any better.
On top of that, people aren't mad about cloud scanning: that's obviously nothing new. Wasting my CPU resources to do it though? It just further perpetuates this feeling that I don't actually own any of my Apple devices, but rather renting them from a company that seeks collection at every corner. As a developer, I was already appalled. Now that they're starting to cut corners at the expense of the consumer, it's only a matter of time before the veneer chips away and we all realize that Apple is Yet Another Big Tech Company Trying To Be Different (YABTCTTBD).
Re: scanning email, I did not see any articles that specifically said that Apple was scanning mail on-device. Can you point me to an article that states this fact clearly? As you say, scanning on the cloud isn’t really an issue since everyone is doing that anyways.
But as a developer you should know email is inherently not a secure method of communication thus you should not expect any privacy when using it. Email is analogous to sending a postcard through the mail system.
On top of that, people aren't mad about cloud scanning: that's obviously nothing new. Wasting my CPU resources to do it though? It just further perpetuates this feeling that I don't actually own any of my Apple devices, but rather renting them from a company that seeks collection at every corner. As a developer, I was already appalled. Now that they're starting to cut corners at the expense of the consumer, it's only a matter of time before the veneer chips away and we all realize that Apple is Yet Another Big Tech Company Trying To Be Different (YABTCTTBD).