You would be surprised at how little investors know about the things they invest in. They only look at the money flow. The case will likely go nowhere though since a small gap in processes isn’t the same as a complete lack of processes that the lawsuit is implying.
risc v is not a concern because they could just build risc v chips themselves, likely more efficient than competitors too. I would be VERY surprised if they didn’t have a team working on it internally. Arm and quality are their big issues right now.