[mst]

Regarding Apple Photos: I was planning to have a look at it, too, especially since it received quite some upgrades with High Sierra.

Still, as JoJu said: when you're used to Aperture and invested the time to learn its features (and learned to use and love them), there currently is no real alternative providing the same level.

That's why I still use it... even though with each macOS uprade its becoming more and more urgent to look for an alternative (and also more and more of a pain, since my library obviously keeps growing...