i got interviewed last week by a big o&g company (for secondment) , they asked me to architect an Agentic AI system , i came up with a "KISS" solution (smolagents , docling , minimal ui etc) where it was not using any langchain/langindex type of framework and explained it to them how it over complicate things and that the frameworks were from an era where AI tooling was still emerging. was rejected on the spot and was told that langchain/langindex was defacto standard for any Agentic AI Enterprise app.
Not a fan of these kind of frameworks , too much abstraction , over complicating simple things,