We take a lot of photos, both of family/friends/pets, but also landscapes and nature, and when curating the photo library, i often find myself deleting the landscape photos of 10 years ago. We don't need to keep 200+ photos of sunsets. Yes it was a pretty sunset, but there are hundreds of those every year, and unless it includes photos of our family or something else "special", the photo doesn't stand out, and will eventually be a candidate for being deleted.
I just finished the years curating, and have deleted almost 60,000 photos from the library. Sunsets, blurry photos (that doesn't have any other value), screenshots, and lots more.
Eventually i will however have to curate it even more. When our kids eventually "inherit" the photo library, they'll most likely be overwhelmed by the sheer size of it, and simply discard it. On the other hand i don't want to leave them without photos of their childhood, and who's to say what matters to them as memories.