Actually, OS Yamato does support a kind of “favorite” (♡) to mark something you want to keep. But! Even favorites fade if unopened for a year
Because hey — if it really matters, you’ll probably open it at least once a year, right? (And if not… maybe it wasn’t that precious after all?)
Also, favorites are easy to find via sorting, and photos can be grouped in albums while memos can be organized with tags — so it’s not total chaos
It’s all part of keeping the garden tidy, not turning it into a museum.