Why not? When defining a class I should have to be able to have implicit collection of objects of this class with each field of the class kept in its own separa

Why not? When defining a class I should have to be able to have implicit collection of objects of this class with each field of the class kept in its own separate array. It's about memory organisation. And languages certainly feel free to impose those with stack, heap and colocation of all fields of an instance regardless of how varied they are in meaning and usage.