Dropbox did this because their core business is data storage so it makes sense to in-house data storage. There’s some simple things you can do, like reservatio

Dropbox did this because their core business is data storage so it makes sense to in-house data storage. There’s some simple things you can do, like reservations, that can cut 30-40% off your bill. In most places I’ve worked, even if we dropped our aws costs down to zero, it wouldn’t materially affect the business. Developers were generally the bigger expense, so having one take say a month to research and migrate instead of building a feature.. usually building features won because there’s no cap on the upside. Cost savings were generally only done if they were quick wins.