If 20 years ago you told me a single piece of software had 428 vulnerabilities I wouldn't have believed it.
If Chromium has that many security bugs, perhaps the move fast and break things approach of spraying diarrhea masquerading as code into a keyboard — in a rush to add new features no one asked for — needs to be reexamined.
For something as complex as an operating system or a web browser, even one from 20 years ago (say, Windows XP or IE/Firefox) I wouldn't have believed there were 428 vulnerabilities either, I would have assumed there were much more than that.
Actually I don't need to think / assume, it's an open source project.
That said, sure, it had a fraction of the features back then, and only a fraction of the world population was connected to the internet.
And the world was better for it. Connectivity and internet are not inherent goods. They can be used for good purposes but it is hard to argue that has been the mean.
If it has 1 vulnerability in every 10k loc of code we'd be talking about 3,000 vulns (with no churn) - we used to care about defect density, and most software wouldn't go more than a few hundred lines without SOME bug, whether that's a "vulnerability" is often a layered question.
Google asked for them. That's all that matters.