Agent Development Kit (ADK) from Google

Pleased to see Google finally writing a nice user friendly python library with proper typing and pydantic. Seems fairly similar to pydantic AI with explicit agent handover. Am curious to see how these two evolve going forward. Poor model coverage at the moment I imagine this will get addressed soon. Anybody played around with it?

Looks like not much interest in this here. I wonder why?

Also I would love to see agent frameworks in java and other languages as well.

What are ballpark figures on what it would cost to run agents with this technology?