Ex-Amazonian here, and while I agree with the facts you present, I do think the "tall" vs "wide" debate is being misapplied here. Amazon is extremely and perve

Ex-Amazonian here, and while I agree with the facts you present, I do think the "tall" vs "wide" debate is being misapplied here. Amazon is extremely and perversely obsessed with, and good at, building decoupled systems at scale, which in essence means lots and lots of individual separate "tall" systems, instead of monolithic "wide" systems. So IMO, Amazon subscribes to a "forest-of-'tall'-services" philosophy. And even at that meta level, I would say the forests are better off when they grow taller, rather than wider.