Oh, wow, interesting to see the resurgence of this thread and my comments from 2019!
I’m typing on the same 2018 IPP I was using back then, but I have to admit that I’m reconsidering the 12.9. The pandemic changed things, as like many people, I began working from home. Part of my reason for going with the 11 inch was that I was using a 13 MBP, and having an iPad almost exactly the same size felt redundant. However, I’m since upgraded to 27 iMac. (Yes, it’s Intel, and it’s going to be updated soon, but I love the machine I have, so no regrets!)
I’ve got three options. (1) Apple is offering $455 on a trade-in for a four-year old machine, which is a great deal, and I have a $200 Apple gift card to further offset the price, so I could get either the new 11 or 12.9. (2) I could keep my 11 inch and go for 12.9 refurb; Apple’s refurbished store is getting them in a lot lately, so it would be (relatively) inexpensive, but it would still be four year old tech. And (3), of course, let it go and wait until next year completely.
Fortunately, I’m not in a hurry either way, but I am looking forward to getting the chance to see the new models in person.