Either...
Better (UX / ease of use)
Lock in (walled garden type thing)
Trust (If an AI is gonna have the level of insight into your personal data and control over your life, a lot of people will prefer to use a household name)
Or lobbing for regulations. You know. The "only american models are safe" kind of regulation.
> Trust (If an AI is gonna have the level of insight into your personal data and control over your life, a lot of people will prefer to use a household name.
Not Google, and not Amazon. Microsoft is a maybe.