Thank you. I have a career of scanned math research notes, in felt-tip color on 32 lb laser printer paper. Teaching through the pandemic forced me on to an iPa

Thank you. I have a career of scanned math research notes, in felt-tip color on 32 lb laser printer paper. Teaching through the pandemic forced me on to an iPad Pro and Apple Pencil. I quickly tired of the primitive Notability interface, and moved to Concepts. One rejects many art apps by testing whether handwriting is rendered naturally (or better), then most of the rest if one wants scalable vector art rather than bit maps. Concepts has the most advanced algorithmic support of those left, as far as I can tell. I certainly have complaints, but in some ways their layers are smarter than Adobe Illustrator layers. For instance one can group art without moving it all to one layer. This is as big a deal as lexical scope in programming languages. I yearn for the calm of a separate device just for pencil notes, but I fear this is like buying a wind surfing board. A week after learning to balance on this board, I'll want a trickier board. Algorithmic drawing is still at the Dartmouth BASIC stage, and the future is exciting. One imagines future drawing platforms with the self-referential power of Lisp. One doesn't imagine moving backwards.