The current scientific consensus[1] is the following:
- porn addiction and sex addiction may be real; the issue is still up for debate, although there wasn't enough evidence to consider porn addiction its own disorder yet
- excessive porn or sex are devastatingly harmful to some people, regardless of whether they're technically an addiction or not
- there are different causes for excessive uses of porn, some of which look like compulsive disorders, while others look like "hypersexuality" (abnormally high sex drive)
- there is no evidence that the increase in porn quality or availability are responsible for destructive porn usage