That's fine for a finished recipe done by someone else - but I'm developing recipes. I have to be able to scribble notes on a printout, with arrows and circles around things, very quickly, and with dripping hands - and without making any on-the-fly changes to the original file - I will need to do those in a thoughtful manner. I can't see an iPad as at all suitable for that.

And, 20th Century? In some cases barely out of the 19th century, and constantly looking back.