Understood, and sorry if some imprecision in my language led to misunderstandings. But because the list is maintained by Google, it means that Chrome is the first browser to expose changes to the list. I thought the article that I linked gave a good overview of how we got to where we are.
Safari got this latest version of the HSTS preload list very quickly too. I don't know what their rollout process is, but it was almost simultaneous. It's true that Firefox and Edge are lagging behind by many months, which is unfortunate.
