Google is definitely good at experimenting (and yeah NotebookLLM is really cool), which is a product of the bottom-up culture. The lack of a consistent story with regard to AI products however is a testament to the lack of product vision from the top.
NotebookLM came out of Google Labs though, and in collaboration with outside stakeholders. I'm not sure I would call it a success of "bottom-up" culture, but a well realized idea from a dedicated incubator. That doesn't necessarily mean the rest of the company is so empowered or product oriented.
