[fabian2k]

R2 is still pretty new. I don't know how well it works in practice in terms of performance and availability. And of course durability, which is difficult if not impossible to judge. S3 has a much longer history and track record, so it has the advantage here. And if all your stuff is inside AWS already there are advantages to keeping the data closer. Depending on how the data is used, egress might also not always be such a major cost.

But yes, the moment you actually produce significant amounts of egress traffic it gets absurdly expensive. And I would expect competitors like R2 to gain ground if they can provide reasonably competitive reliability and performance.