Let's be honest here people:
Everyone was praising the Air 2 because of it's incredible speed and the night and day difference between caused by the RAM. Now the 13" iPad has 4GB of RAM and suddenly 2GB is unbearable? I'll admit that charing $150 more and not adding the RAM is annoying, but speaking from experience I have almost NO issues with an Air 2. I could have 8 Safari table open, 4 other smaller apps, play a 3D game and come back to Safari the next day and all my tabs where there. Sure, I would have liked 4GB, but I think 2GB is still more than sufficient for now and I don't think the Pro is going to become a hunk of junk.
As for people comparing it to the iPad 3. This iPad has nearly 20x the CPU/GPU power as the iPad 3 with the same screen The A9X is incredibly fast and efficient with less heat, the display is lamented and it has 2GB of RAM which was top of the line 6 months ago. This device is not going to overheat and become a lagging mess like the iPad 3.
The Air 2 was going to be the next "longevity" model - the Pro is 2x as fast with Apple Pencil, why is the Pro now an "iPad 3 failure" when it's even better than the "longevity" model?
And aside from less layers in Procreate (which no one has a number) and the inability to keep more than 15+ tabs open in Safari along with 7 other apps, what negative consequence are you suffering from having 2GB or RAM?