Serverless V2 is also shit. The minimal one equivalent ACU to a regular instance has lots of latency spikes and much slower than a t3 instance.

We also tried serverless Redis. We have a tiny machine at %10 CPU utilization, but sustained queries. It costs 20x more. We were very afraid of the result we just ran it for an hour to get an idea.

Serverless, pay per use sounds only good if you have very few or unusual traffic.

We just run a monolithic but stateless Spring Boot Application and a dedicated RDS instance with reader in stand by. Only serverless dependency is SQS because it works nice enough. This simple infra has allowed us to iterate and pivot our startup very fast as needed. We still need more customers though.