I've only used Azure so far. I can see why a big company would choose Azure. Although as we move further into the tech era, we're going to see a decline in the size of companies. Internet services will continue to make it easier for small companies to offload pieces of work to other small companies. They'll get good quality results for reasonable costs. Then soon, these small companies are producing big company results, shaving off big company profits. Welcome in the hunter gather era of computation. Bottom line, if Azure stays around, it's just going to become what AWS already is.