Terrence, there is nothing in Photos called Events. It is Moments and Collections. Both are only based upon date and location - and are not based upon Subject matter.
The organization tool that is missing from Photos is: Events.
Also, what is missing is the ability to easily move photos to easily create groupings by Subject matter. Date and location are not how I organize my photos. I create Subjects.
The key that is missing is the ability to easily arrange your photos by Subject matter. Photos prevents the user from easily creating his or her own subject matters - things that appeal to the individual user - rather than the pre-selected groupings of date and location. That is why Photos is like a clump of photos thrown into a shoebox - with the most recent clump on the top.
I know someone will write: why don't you create Albums?
Notice the key word I used: "easily" arrange. iPhotos allows you - without the slightest effort - to create your own organization by Subjects that mean something to you as the user. I have no desire to spend hours duplicating all of my pictures by creating albums that are separated from one another - rather than Events - that seamlessly allow you to view all of your photos in the same location while allowing for an organizational system based upon Subject matter.
I paid to take a course at the Apple store to learn how to work with Photos - so I am not ignorantly ranting here. The Apple instructor concluded that if you are concerned about photo-organization, you should not use Photos - you should use iPhotos.
What I learned about Photos is it has the ability to have all of my photos on my iPhone. Since I have no use for that, I found no advantages to using Photos.
Now if I may rant:
- I understand why Apple went to Photos. They are in the business to make money - like any company. And they were merely chasing the market in which most people have no concern about organzing their photos and want all of their photos on all of their devices. So I understand that.
- My criticism of Apple is that Apple either did not care - or they were not clever enough - to devise a system that allows photos to cross from one device to another - while still allowing users to easily create an organziational system based upon Subject matter as exists in iPhoto.
End of my rant.