it's not the direction the company wants to go Nor has it ever been. While lists might appear to work now, I would not at all be surprised if lists are a leaky

it's not the direction the company wants to go Nor has it ever been. While lists might appear to work now, I would not at all be surprised if lists are a leaky abstraction with all sorts of holes that would require the codebase rearchitecting that the original story believes. When you have such a fundamental design decision baked into everything you've ever done, it can't change overnight. Perhaps they've been working on it for months or years, but certainly its only in the last year that anyone has been talking about this problem earnestly.