Is there any reason not to merge _Storage and _StorageRoot?

[nritsche]

@kiyo-masui after you had good arguments against the last proposal of changing the design, I'm hoping to get your opinion once again (again).

According to @jrs65 there's no good reason anymore to keep _Storage and _StorageRoot two separate classes.

[kiyo-masui]

I would merge this issue into #115. No point in tackling them separately and once you figure out how these classes work you'll know the answer to the question.

[jrs65]

Yeah. I agree with Kiyo here. I think the whole module needs some refactoring to reduce the structural complexity. These items were two of the things I thought possible, but they should really be considered in combination.