There'll be an opt-out, just as there always has. That's not what's being discussed here. The question is whether to allow these stats to be collected as an opt-out vs opt-in.
Before you send any telemetry get informed consent by presenting the user a dialog enumerating everything that you are sending and I'd be fine with opt-out otherwise this is a dark pattern and you are getting on my shit list.
If you present the user a dialog, that is effectively opt-in, which is what already exists.