It's nothing new, just being reported far more than it used to be.
My first dog attack was back in the mid 90's while walking my dog. A Pitbull from the local travellers site decided he wanted to eat my dog for breakfast, thankfully i managed to hold my beloved pet above my head while the Pitbull stood on my chest & gnashed at my face. My second was in the early 2000's while again, walking my dog, this time a local beast of some description decided to ravage my pet, my beloved Toby, a small yorkie cross, thankfully he was too stealthy & ran off while i was holding on to the dogs bollocks like my life depended on it. Third time, 2008, i was on a bus heading to Wolverhampton when the bus stopped at the lights outside a park& i noticed another beast of some description ravaging a woman's beloved pet so i stopped the bus, ran over & kicked the dog so hard in the balls they probably came out of it's mouth, it loosened the grip & ripped my hand to pieces in the process, at which point the woman took me back to her home & got her husband to take me back home. The woman's dog survived, just.
Instances such as this have been commonplace for decades. Of course very little is ever done to combat illegal ownership of dangerous dogs, just the usual headline to appease the public into believing it's safe.
In the end it comes down to the owner of anything that has the potential to cause lethal or sometimes fatal consequences, to take responsibility.