I mean something could still happen, who knows? Maybe Huawei or Xiaomi or Canonical or IBM will see some value in it and make something out of it, but I fear it might be too late for them.

And Brave is not Chrome. It's based on Chromium. Many other companies depend upon Chromium codebase for their browsers, companies like Microsoft, Samsung, Amazon, Tesla. If Google does stop the development, there is a good chance that someone else will pick it up and keep it shared and open to distribute the work required to develop and maintain it.