It's still the core business by far.Over the past two decades, Amazon (AMZN -0.17%) has built up an unmatched e-commerce business. At the same time, it's constantly experimenting with new business ideas. One of those ideas, Amazon Web Services (AWS), has grown to become the largest cloud computing company in the world by sales. Along with AWS, Amazon is developing several other concepts already successful or in the baking stage.Given this diverse business model, is e-commerce still important to Amazon's tot ...