In practice, it is theater. Are they going to do this with the code output too? This is nonsense security theater for the low thinkers to have a sense that someone is in charge. When we all know nobody is in charge, anywhere.

Their AI model tends to write a lot of lengthy comment blocks.

That's a fine place to put the watermark to track those users who accept the code blindly and don't delete/edit the comments.

EU regulations are going to force it, friend. The tsunami is coming and cannot be stopped and Anthropic has jack to do with it.