2019 sales have Honda Odyssey and Chrysler Pacifica outselling Sienna. Sienna’s available AWD may make popular in snow states.
I had a new 2017 Caravan, it pulled to right a bad that when you let go the wheel you couldn’t fast count to 3 without running off the road. I drove two other GC’s and even a new Pacifica and it was the same. Chrysler said it was normal. I sold the Caravan at a loss then I drove a Toyota Sienna and it was perfect, didn’t run off the road or even a slight pull to the right.