It's not giving up; it's embracing a set of risks for a reward. The question is whether one feels the set of risks and the reward are too ill-defined to make the trade worth it.

Microsoft appears to be in the business of trying to build a fully-functioning virtual assistant. If they're solving that problem with big data, they need a full stream of the user's behavior to operate on. But the tradeoff---an actual, working virtual assistant---could very well be worth it to people for whom that personal information is not worth hiding from a corporation with no vested interest in undermining their customer base by irresponsibly divulging that data.

If anything's sad, it's that we live in a world where some people do not have the freedom to treat their private info so loosely. That's a true tragedy, because there will increasingly be technologies they can't take advantage of.

I think they should definitely have the freedom to treat their private info loosely, but I think that the decision itself should be an Opt-in rather than an Opt-out affair. We shouldn't have to build our own tools to turn this off.

Can someone explain this?