Or if you need to egress a lot of data to the Internet. Or send a lot of data between different AZs. Or between Regions. Or anywhere really. Plus now you have to get a PhD in AWS Billing first: https://twitter.com/QuinnyPig/status/1155838435065655296/pho... and https://twitter.com/QuinnyPig/status/1172239124251709449/pho...