Got the chance of watching Robot Dreams on Thursday, and this is the first time I wathced all the nominees for animated movie prior the ceremony (and the best part is that except for Nimona, I experienced all of them in theatres).
While I didn't love any of the nominees, at the same I didn't dislike any of them.
My ranking would be:
1. Across the Spiderverse
2. Nimona
3. Robot Dreams
4. Boy and Heron
5. Elemental.