Amazon should stick to what they are good at and stop releasing these also-ran products.
I would expect a store of Amazons scale to do a far better job of categorising and searching information than what they offer right now. Also discovery of new books is very suboptimal in my opinion.
Which is what? Cloud services? Logistics and Freight Routing? Physical inventory management?
Almost every product they have is a wildly successful variation on a mildly successful already existing product.
AWS, fire TV stick, echo dot, Amazon fresh, audible; all of these are great products / product lines that have little to do with delivery of non perishable goods.