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 then you probably need lxc, not podman/docker.

As every tool, kubernetes/docker/podman are useful in some scenarios. They are specifically tailored around an idea of one (main) process per container.

But ppl are more like: everything look like a nail when I have a hammer. 
 Podman is buggy and terrible..... devs should make better applications or optimize. Most apps require a database which ends up being a  bottleneck because they dont scale like applications  
 may be.

however not all applications are the same. Sometimes you need just functions, serverless or similar.

I wrote apps based on kappa architecture which scale very well (processing and serving tbs of same data for different purposes and apps) 

Particulary when you can simply just add processors/functions without any server configurations.