Well, I think we're pretty much on the same page regarding where the complexity comes from. For Twitter though I'm thinking though that they should have put a

Well, I think we're pretty much on the same page regarding where the complexity comes from. For Twitter though I'm thinking though that they should have put a lot more effort in simplifying the systems/processes/data they store. This might even mean pushing to remove some business requirements that a PM might have introduced just for a promotion to reduce software complexity. If you don't reward people for refactoring and removing complexity, I don't think you can just blame it all on organic growth.