The way I see it, Amazon, as a growth machine, keeps its growth options (organic/inorganic) open and when sees an opportunity for inorganic growth they will go for it. The most recent example being their acquisition of Whole Foods. They were anyway investing in growing their brick-and-mortar presence and opportunistically acquired Whole Foods to fast-track it.
Relatedly, Amazon has to be one of the most diverse corporations ever. From AWS to media studio. Which other corporations come close?