It is not a difficult security measure and it takes only a few minutes. However, an astonishing number of people online do not update their browser:
“Almost half the online population is at risk because users have not installed security updates to their browsers, says a study.
The Swiss Institute of Technology, Google and IBM conducted the study and found 600 million users had not updated their browsers.”
Not patching is not only a security risk for oneself. It aids hackers in propagating security issues onto others online. It is just irresponsible behaviour which just gives hackers the advantage by a staggering number.