Every tool in this category that has a published, evidence-checked JAVIS review.
LangGraph didn't win the "which agent framework" argument by being the friendliest. It won by being the one that doesn't fall over.
The SDK didn't get replaced by the Agents API. It got a sibling.
This isn't Microsoft's first agent framework. It's Microsoft admitting the first two weren't going to converge on their own.
CrewAI didn't get worse. It got a name change, a smaller price sheet, and a genuine security scare it actually fixed properly.
ADK is genuinely serious engineering. "Free" is true of the framework, not of what running it actually costs.
This is OpenAI finally selling you the thing it already trusted itself to run.