Even managed databases are a scam. You can easily get 10x cheaper pricing for the same workload, by, wait for it, installing Postgres yourself on a baremetal machine. Plus you get much better performance, no noisy neighbors, and ability to actually control and measure low level performance. I never got the hype for serverless. Why are people so allergic to setting up a server? It takes a few hours a year of investment, and the performance benefits are huge.