I also digitized over 200+ photos of the in-laws from the typical physical albums using Google Photoscan (I think about 10 years ago). I did it just for fun and to see what the workflow would be for digitizing the photos.

The ideal flow would be having a good-quality flatbed scanner and hiring someone to scan them. (I'm in India and the cost is comfortably affordable to set up such a process.)

Recently, when colorizing and animating photos was new and fun, I animated pictures for a few of their great-grandparents. It made quite a few grown-ups cry with joy.