In the 90s aircraft manufacturers basically stopped whole segments of the market (anything smaller than a piston twin) due to litigation. I wouldn't be horribly surprised to find we spend the next 10 years fighting about this stuff in court.

I'm fully aware of lots of times powerful companies have used the courts to protect their business. My point is basically all of the powerful companies are elbow deep in LLMs to the extent of some sort of mutually assured destruction if they were to start court cases like this.

LLMs have been firing out a lot of code for a year or 2 now at least, so I would have thought we'd start seeing some court cases by now?

It's purely conjecture at this point but my gut feeling is most companies are in high spirits about the costs they can save and the benefits it can bring to their own business. I don't think enough time has passed to see really high profile losers. What happens when Infosys starts losing money or Free CAD becomes the next SolidWorks due to LLM driven improvements?

The lack of modern small airplane designs, especially engines, is the extensive and thus expensive certification process. Most of what is a "new" airplane usually is derived from a very old, grandfathered design.

The only real innovation for small planes is in the electric flight area - when you gotta do a full certification anyway as you're piloting an entirely new drivetrain, you can financially afford to be much more innovative on other parts of the design.