Yes, but unlike behemoths like Broadcom who have successfully locked down certain types of software through patent-fu, Nvidia does not (currently) have a way to

Yes, but unlike behemoths like Broadcom who have successfully locked down certain types of software through patent-fu, Nvidia does not (currently) have a way to stop AMD from creating their own software. This means that with enough incentives - and there are plenty right now - the competition can reasonably catch up in the next 2-3 years.