I worked with search and ads model at Google, for most things tree models were better. What evidence do you have that neural nets are better there? I worked wit

I worked with search and ads model at Google, for most things tree models were better. What evidence do you have that neural nets are better there? I worked with large parts of Google search ranking so I know what I'm talking about, some parts you want a neural net but most of the work is done by tree models and similar, they both perform better and run faster.