I got to know about AndroidX from this Android Dev Summit video. The summarization is -

1. No more support library: The android support library will be never maintained by Google under the support library namespace. So if you want to find fixes of a bug in support library you must have to migrate your project in AndroidX
2. Better package management: For standardized and independent versioning.Because previous support library versioning was too confusing. It will release you the pain of “All com.android.support libraries must use the exact same version specification” message.
3. Other God libraries have migrated to AndroidX: Google play services, Firebase, Mockito 2, etc are migrated to AndroidX.
4. New libraries will be published using AndroidX artifact: All the libraries will be in the AndroidX namespace like Android Jetpack

I got to know about AndroidX from this Android Dev Summit video. The summarization is -

1. No more support library: The android support library will be never maintained by Google under the support library namespace. So if you want to find fixes of a bug in support library you must have to migrate your project in AndroidX
2. Better package management: For standardized and independent versioning.Because previous support library versioning was too confusing. It will release you the pain of “All com.android.support libraries must use the exact same version specification” message.
3. Other Good libraries have migrated to AndroidX: Google play services, Firebase, Mockito 2, etc are migrated to AndroidX.
4. New libraries will be published using AndroidX artifact: All the libraries will be in the AndroidX namespace like Android Jetpack