You and I must have different definitions of the word “immediately”. The article you posted is from January 15th. Here is a story from January 2nd:

https://www.bbc.com/news/articles/c98p1r4e6m8o

> Have the other AI companies followed suit? They were also allowing users to undress real people

No they weren’t? There were numerous examples of people feeding the same prompts to different AIs and having their requests refused. Not to mention, X was also publicly distributing that material, something other AI companies were not doing. Which is an entirely different legal liability.