I would like to second the complaints of @oliverb. Although I understand the container argument with artboards and the like, the result is annoying, if you have to deal with an average of several hundred images per project. While I use artboards in Designer practically all the time, there never was the need to do so in Photo. So from my perspective you cannot see an absolutely basic file information in Finder or any DAM, but to compensate this lack you might theoretically enjoy artboards in Photo (in case you own Designer as well). Sorry, but I wouldn’t consider this a very good deal. Als oliverb said: the information is obviously there, so why not writing it to the file metadata? Photo is otherwise an absolutely great product I love to work with, so it’s incomprehensible why one has to struggle with such annoyances.