Cortana worked damn well for a while. Feature rich, able to understand me better than googles assistant. And despite this they found no way to earn money on it and just gave up. Not by just disconnecting her, but by slowly stripping her of every useful feature.
I don't trust copilot to stay around. They gonna try a few half hearted attempts at capitalize it, then just give up. Like they did with Cortana.
Would be nice if every game publisher was required to contribute a version of their game, that can be played without an external network or license, to the country's main library. For cultural safe-keeping. I know at least one country does that for books.