I'm not sure. Cortana is really far behind as far as functionality is concerned. Plus, there are far fewer manufacturers showing interest in Cortana. On my PCs, Cortana is pretty much useless to me. But, I use Google Assistant pretty much every day. Microsoft is facing a major uphill climb, but I'm still hopeful.
Yea I hear ya SGL! Really I think it's a 3 horse race between Assistant, Alexa, and Siri. No offense to Cortana and Bixby.