The bank has revealed it will explore introducing controversial technology that stores biometric data, replacing the need for PINs, after research suggested customers were willing to embrace it. [emphasis mine]What percentage of people must embrace something before it ceases to be "controversial"? The article's implicit answer is "more than 79%."
The article is only five sentences long, so I'm not cherry-picking an odd sentence from a long article. The whole set of the article's facts is that a bank's study found that a Pareto of people are totally OK with fingerprint biometrics, which pretty much means that they're the opposite of controversial.
