ADK is great framework for building agents as it is runtime agnostic and you can choose which properties are important to you. You can run your ADK agents also on Restate (https://google.github.io/adk-docs/integrations/restate) if you want to turn your agents into durable agents that can reliably communicate with other agents.

only in the python implementation

I already have durable agents in ADK with postgres and dagger