When I get my new pixel, I just login and everything is there, I assume apple is same way? this seems common these days
These days cloud backups and the like make it pretty simple on both operating systems.
I have voice memos that have migrated since that very first one.
Since i like to search for photos on the map on the macOS Photos program, this can be problematic. So when i was looking for a specific photo the other day, i had to scroll back by date to find it and that's how i found out it was taken on an original iPhone.
Originally it was syncing through iTunes but the past years it’s been iCloud syncing.