Adobe Illustrator isn’t being discontinued, or are you saying it’s being discontinued at your workplace?
A curriculum? What is the nature of this curriculum that involves around 10,000 pages? Are these individual pages created in Adobe Illustrator? If so, why in the world would you have used a drawing program, like Illustrator, for something like this? Without knowing more, I suspect that a page layout application, like InDesign, would have been far more efficient and appropriate.
As for converting those Illustrator documents into something else, how were they saved? Were they saved as basic Illustrator files, PDF-compatible Illustrator files, or something else? Depending on how they were saved, the files may be opened in Affinity, CorelDraw, or Canva. However, Illustrator documents are often complex in ways that other software applications may not support.
Are you simply looking to save them as files that can be opened? If so, save all of them as PDFs, which might be automatable with some scripting, but that depends on several factors you haven’t mentioned. If you want those files to be openable, usable, and editable documents in another program, the software I mentioned earlier might do the job. However, it might not be the best solution for your fundamental issue of converting the documents into a format best suited for the most appropriate software application to manage and create over 10,000 files moving forward.
If it were me, I’d search for a way to store all the information in a database that could populate a template or templates when needed. Then again, I’m not familiar with the nature of those documents or the reason you produced them as individual Illustrator documents.