Before Class Creator, I used an online photo gallery called Imageevent.com. They allow comments on the whole gallery and on individual photos. Over the years, the comments are more meaningful as people have aged and some who made comments died.
It's kind of stagnant to post photos in the gallery without the ability to make comments. I've noticed classmates this time around are opting for Facebook to post photos to get that interaction. I think it would be a huge benefit to add the ability to add comments. I did discover I can embed imaggeent.com into the gallery and might use that instead but it's clearly dated technology.

Good to know. Thank you.