I would love to know what the margin boost is to AWS as a result of Graviton. It's cheaper to customers but I have to imagine better margins to them - so kind of a win/win. It's just amazing how they're pushing it out to every AWS service at this point. We transitioned over our RDS instances to Graviton this last weekend and have a nice performance boost with ~10% savings.
Disclosure as I'm Co-Founder and CEO of Vantage - but we'll likely be adding Graviton recommendations to our suite of cost saving recommendations on https://www.vantage.sh/ to give per resource views of potential savings (i.e. you can save X% on this Lambda function based upon the costs we saw by switching to Graviton, etc.)