My thinking was that there might not be an enormous economic incentive for the manufacturer to keep the hardware able to communicate with a modern operating system. At least not indefinitely.
I am thinking of something that is perhaps similar that happened to me. I own a Micro Modular which was made by Clavia a long time ago. That hardware was almost unusable to me for the longest time until someone smarter than me figured out how to make it work with a modern operating system.
As I was very much contended at this turn of events I made a short video for demonstrative purposes:
I suspect you are not alone in your predicament. Others with similar issues will most likely rally to find a solution. Eventually at least. I empathise strongly with your situation and I wish you the very best of luck.