> Even Amazon.com or Google apps host on their own cloud and not use multi cloud after all, their regular businesses are much bigger than their cloud biz
This is probably true with Google, but AWS contributes > 50% of Amazon's operating income. [1]
Interesting, no wonder AWS head became Amazon CEO.
Their retail/e-commerce side is less profitable than AWS but the absolute revenue is still massive and the risk of losing that a chunk of that revenue(and income) due to tech issues is still enormous risk for Amazon .