A lone judge making a speech upon his retirement does not make policy. Wake me if any legislature takes up this cause.
"Knife control" has become policy in the UK though. At least in London it has. While it's not the specific proposal this judge is talking about, it has become a crime to carry a knife on your person in public in London. You also cannot buy a knife in the UK if you are under the age of 18. They even have certain types of "banned knives".
Don't believe me? Well, maybe you'll believe the UK's official government site regarding the matter: https://www.gov.uk/buying-carrying-knives
And why is the government of the UK going to these lengths to control knives? Because knife crime is skyrocketing, especially in London. And what is one of the most common arguments gun advocates have made? Take away guns and criminals will find some other way to kill people. And the point of making such arguments is to make the point that banning weapons does nothing to stop violent crimes because people who want to be violent are going to be violent, regardless of their access to weapons.
"But banning weapons will limit the damage those violent people can cause!" Yeah...not really. London's murder rate has surpassed New York's for the first time in history, so it seems criminals not having access to guns (and soon knives) isn't slowing them down at all. Sure, someone may not be able to mow down 40 people in one event, but it doesn't matter how quickly murders happen, all that matters is how many. Let's say both New York and London experience 1,000 murders in a single year. Would it really matter if New York's were all done through mass shootings, while London's were all done as one off, isolated crimes? They both still had 1,000 murders. In fact, I would say London's problem would be worse in that scenario because it means they have more murderers overall than New York.