I don't see it. I think all the other browsers just had to become light and fast too. Even Microsoft was forced to say goodbye to IE, and instead based Edge on Chromium. And tech people were eventually able to switch back to Firefox because it got much faster too.
Google wanted a world where all browsers were light and fast in order to efficiently run complex webapps -- and they achieved that. Kudos.
The original Chrome just felt like a barebones window to the Internet. Though I agree that Firefox et al. became much less sluggish over time. (Is that only their performance improvements or did hardware get better faster than they grew?)
Also maybe "light" and "fast" shouldn't be lumped together. Chrome can definitely be fast when it has enough resources. That and sandboxing seem to make it much _heavier_ in RAM.
The web pages you visit are.