Between Drive and Photos. Also it's only one way now, up, you can no longer sync photos between computers. It was major news for Photos users when it happened. I'll provide a link for more info. There was a large amount of functionality lost when this happened. Iirc it also dropped the ability to save Photos in native resolutions higher than the compressed Google format but I'm not 100% on that since I sync my family photos using Plex to my own server.
