Yep, that would be incredibly ineffecient, so they use a smarter approach - https://support.apple.com/en-us/HT205919#existing https://support.apple.com/en-us/HT

Yep, that would be incredibly ineffecient, so they use a smarter approach - https://support.apple.com/en-us/HT205919#existing https://support.apple.com/en-us/HT205919#existing