[55555]

It honestly doesn’t matter. We’re talking about hundreds of millions of devices sending data in either case. A hundred million more provides no additional value.

[brookst]

...unless there's a correlation between opt-in choice and usage patterns.

[DwnVoteHoneyPot]

That’s the trade off. You don’t opt-in, then you don’t get customized stuff. Shouldn’t be surprised if Apple doesn’t optimize for your usage.