> News back then were about intentionally prompting to output known copyrighted material.
First, there are other cases if you take the time to dig. This is quite an old example (GPT-2) as i haven't kept up to date on this field recently, but it does show that this problem has been known about since before these systems were widely adopted: https://arxiv.org/abs/2012.07805 [0]
Second, GP said nothing about the type of effort required to make it happen, just that it can be done and that the copyright owner could come along and cause legal problems later. It's absolutely possible to have a fly-by contributor who purposefully asks for code that reproduces X/Y/Z without a maintainer knowing about it.
But then the maintainer is the one in legal trouble.
> When, despite millions of developers using agentic AI already, are these lawsuits supposed to manifest?
Legal / copyright / etc. cases often take a lot longer than a couple of years to come to fruition.
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[0]: edit -- to clarify this is an example of the reproduction problem, not an example copyright infringement case.