Hasn't happened to me yet, but infringement strikes have been ramping up for people around me. Might only be a matter of time. Might actually be time to hit the panic button on this one, as AI continues to develop and music continues to get greater and greater scrutiny. How many arenas will receive attention?
How much sample library/loop content is capable of generating a strike? How much energy will need to be expended to contest an infringement strike?
I would imagine that the bigger loop producing sample developers are most at risk (e.g. Heavyocity), but I imagine a lot of things could eventually be at risk (e.g. evolving textures that have some melodic content). I do see people out there encouraging people to "make it your own," but I wonder if that might be a moving target. Will the AI develop to detect changes?
Essentially, you can be buying libraries and content with EULA agreements allowing you to freely use them, but if someone beats you to it as far as incorporating something into a composition, that could be flagged as a violation (even though they don't "own" it).
I am already seeing some clients specify "No loop material - one-shots only." That's probably the safest route.
Worst case, I could see present trends impacting vast libraries of music people have already created using a certain amount of loop content that could generate infringement strikes. More important clients are NOT going to want to deal with that, and that could lead to liability issues for music creators. Not a big deal if the infringement involves a piece you personally put out, but it would be a big deal if it's part of a movie, important ad campaign, etc.
It's going to be interesting to see how this plays out over the coming years. We might be in for a rough ride. And, for anyone hoping to create music that has a long shelf-life, it might be a good idea not to touch any looped content, or longer textural content with a ten foot pole.