I think Android users would be more open to adopting a new call/message app. Apple users however are pretty well anchored to the iMessage/FaceTime combo.
Besides the hordes of Apple users that seem to use WhatsApp/FBM/Signal etc without any problems?
If anything Android might be worse off, if it's like Prime Video the app won't be available on the Google Play Store and you'll have to install Amazon Underground or w/e they call their app store now manually then download Amazon Prime Video for your device.
Besides the hordes of Apple users that seem to use WhatsApp/FBM/Signal etc without any problems?
All three of the examples you laid out have specific use cases that propelled their popularity
WhatsApp: free SMS which was a bigger deal, especially internationally when it hit the scene. The Echo Show is US only for now.
FB Messenger: access to the walled garden of people that live in FB
Signal: secure private communications.
I'm not saying that Apple users won't use other message mediums if there is a compelling reason but I am saying for Apple users that are in predominately Apple-centric family/social circles the Echo messaging/video chat app doesn't offer meaningful differentiation from iMessage/FaceTime.
If anything Android might be worse off, if it's like Prime Video the app won't be available on the Google Play Store and you'll have to install Amazon Underground or w/e they call their app store now manually then download Amazon Prime Video for your device.