Traditionally, large corporations have taken very conservative legal stances with regard to integrating e.g. A/GPL code, even when there's almost no risk.
If my license explicitly says "any LLM output trained on this code is legally tainted," I feel like BigAICorp would be foolish to ignore it. Maybe I couldn't sue them today, but are they confident this will remain the case 5, 10, 20 years from now? Everywhere in the world?