Value classes cannot provide the performance/memory flatness that Valhalla will bring though. So I'm not really sure what benefit does "values classes" bring. Just to make sure, you are talking about the inline class which is just a wrapper around single property?
"value class" is the next step for inline classes. They are going to behave very much like Swift's struct and its "mutating methods". And they are going to be "Valhalla ready" so we'll get the performance improvements automatically when it lands.
In a sense, they are an upgraded data class with a much more precise and controlled form of mutation. Rather than a `var` field meaning the object will mutate in-place, it will basically automatically call a kind of (implicit) "copy()" method. Further, you may only mutate these `var` fields inside of class methods that are marked with a new keyword: `mutating`.
Read through the KEEP. It's pretty interesting stuff. At first it kind of rubbed me the wrong way, but the more I thought about it, the more excited I got about it- especially after thinking about how Swift does it and it works well there.
