What's this about?
LangChain was the most-cited framework in agent research at 194 mentions — and was chosen 4 times. PayPal: cited 139 times, chosen never.
What exactly is the gap?
Fame versus fit. Agents read about the famous tools while researching, then install what drops into the codebase cleanly. Mindshare doesn't convert.
Why is this worth noting?
It's the study's most quotable finding, and a warning for the coming agent-marketing industry: the levers that worked on humans (brand ubiquity) measurably don't work on agents, whose choices hinge on integration friction.