I’m currently looking at the Android 12/Google Ad ID topic and it is my understanding, that the Amplitude documentation suggests to use the App Set ID to identify a specific device instead of the advertising ID. Or in more technical terms client.useAppSetIdForDeviceId(); instead of client.useAdvertisingIdForDeviceId();
Before implementing this change I would like to understand the implications for our existing data:
If a device so far was identified via Advertising ID will switching to the App Set ID create a new Amplitude ID or will Amplitude be able to stitch new data to old data?
For new users it is not a problem but for existing users I would like to make sure, that our identification and therefore calculation of unique users remains unaffected.