Quibble: to me "This is day one" is less about "what market can we get in on the ground floor of and ride a wave". It is more to underscore we are driving the innovation or market and that we are always starting from zero, never too late to change / pivot and we're still aggressively growing everything, or that is the goalline.

That isn't meant to take away from your question. As a developer I'm often focused on leaf concerns. Your question is more about broad strokes and I have to remind myself to think about fundamental changes.