Does that apply to their tablet as well or just streaming devices ereader and smart speakers? Giving up android on their tablet would kill their whole app library i don't see them doing that lightly.
https://developer.amazon.com/apps-and-games/vega
But it would surprise me otherwise, I never seen those Amazon Android tablets around here in Europe.
Kindle yes, the e-ink ones, all over the place, including at beach during Summertime.
Regular Android tablets it is mostly Samsung, Huawei and Xiomi.