[bradleybuda]

Built-in applications are great opportunities to dogfood new platform features. I'm speculating, but calculator may have added telemetry as a way of testing the relevant SDKs, APIs, data visualization systems, etc, not necessarily because a PM a Microsoft somewhere actually cares what percentage of users press the "multiply" button.

[reaperducer]

It's not dogfooding if you unleash it on the public.

Surely Microsoft has an accountant or two on staff. Let them test it in-house.

[TheAceOfHearts]

Well, not unless they consider their users to be dogs.