not all telemetry

some cannot be disabled ("anonymized")

some is still opt-out

just off the top of my head on iphone: settings -> search -> help apple improve search

Isn't the checkbox already ticked though? I'd say that's opt-out. The user must take direct action to avoid telemetry.

It's not a check box, its a button choice ("Share diagnostics" "Don't Share")

It's pretty explicit in intent.

My mistake, I misremembered. s1mplicissimus makes a very good point. What I do remember is it's designed to capture telemetry opt-in of people who aren't savvy and just click next, next, next.

Usually, there's a default blue bordered button and a non-highlighted grey one. Any chance the default blue button says "Share diagnostics"? Because that would still make it an opt-out

With Liquid glAss CarPlay on non touchscreen cars they changed the button colors so that gray is the selected item and blue/green are not selected. Also they changed the back on-screen button to be the default, or sometimes they select the item you want but then a second later change focus to the back button.

When you first use CarPlay there are consent screens so there are definitely people out there who have picked the wrong one.

Technically yes, but most would consider an opt-out some tiny little nearly illegible that confuses the user into allowing it without deselecting. This is a clear choice given to the user. No gimmicky opt-outs.