It doesn’t work for AI 2022
Hi Jeremy -
I’m not sure why this thread wasn’t informed but RH-61109 was fixed last year.
As I wrote when I put that on the list, we can only control what Rhino does and this fix made Rhino correctly read nested layers in PDF file. As stated previously, the PDF files that are written from Rhino have nested layers - as you can verify by reading the PDF into Adobe Acrobat Reader. What Illustrator does with them is up to Adobe.
-wim