You're right that Chromium* is a very difficult task, but I disagree with the conclusion you draw. I think Chromium is one of the best examples we can consider.

You're right that Chromium* is a very difficult task, but I disagree with the conclusion you draw. I think Chromium is one of the best examples we can consider. There would absolutely be issues, including security issues. But there is also very good evidence that the issues that are most exploited in browsers and operating systems relate to memory safety. Alex Gaynor's piece that the author linked is good on this point. While securing Chromium is huge and a difficult task, it and consumer operating systems are crucial for individual security. Until browsers and consumer operating systems are secure, individuals ranging from persecuted political dissidents to Jeff Bezos won't be secure. * Actually not sure why I said Chromium rather than Chrome. Nothing hangs on the distinction, afaict.