What I love the most is the sheer amount of thought and philosophy put into Valhalla. It transcends the binary understanding of object vs value and actually defines 4 distinct buckets:

1: Classical Object

2: Object without identity

3: Atomic Value

4: Classical Value (Tearable)

Each bucket has clearly defined performance characteristics and semantic constraints. So depending on the nature of your data, you can always get some benefit from values even if you couldn't go all the way. This is a work of art.