>the author is basically complaining that Chromium decided to update itself. Well, maybe it warrants complaint, but I fail to see what's such a big deal. (The alternative is millions using browsers ridden with last year's vulnerabilities.)

You're misrepresenting mandatory enrolment in A/B testing with plain software updates. Firefox is an example of a browser that does software updates, but does not force you to use potentially buggy features - and yet they do not have "millions using browsers ridden with last year's vulnerabilities", because their alternative is to give users a choice to enroll in experiments. I do participate in experiments since I wish to improve Firefox, but I could switch to any time to no experiments at all.