I feel like this is a bias in the HN bubble: In the real world, 99% of companies with any sort of web servers (cloud or otherwise) are running very boring, constant, non-Uber workloads.
I am pretty sure Uber belongs to the 1% of the internet companies in terms of scale. 37Signals isn't exactly small either. They spend $3M a year on infrastructure in 2019. Likely a lot higher now.
The whole Tech cycle needs to stop having a top down approach where everyone are doing what Big tech are using. Instead we should try to push the simplest tool from low end all the way to 95% mark.
Cloud is a scam for the vast majority of companies.