TLDR: AWS is super-expensive at scale.
Of course it’s expensive to rent your computers from someone else. But it’s never presented in those terms. The cloud is sold as computing on demand, which sounds futuristic and cool, and very much not like something as mundane as “renting computers”, even though that’s mostly what it is.
It’s also about what kind of internet we want to operate in the future. It strikes me as downright tragic that this decentralized wonder of the world is now largely operating on computers owned by a handful of mega corporations. If one of the primary AWS regions go down, seemingly half the internet is offline along with it.
Methinks this will become even more of a trend in the coming months and years.