Is Google a tech company or a company that uses tech?
Change was driven by new technologies, such as sharing files between computers, or HID research.
Whether they are now an ad company is debatable, but it is certainly where they want to be. Even their new features used to be technical driven (Use IE to get ActiveX), now they are trying to get more eyeballs on adverts (use Edge or we will subject you to more pop-ups!).