Well. Here's an update. She's been in the house for a year and never adjusted to the lower humidity indoors no matter what I do. She is suffering so she will go back outside this spring when it warms up. That's too bad. I really enjoyed her inside the house.
If the pink syngonium continues to do well indoors I will keep replace the palm with it. But one sign of stress and out she goes, too! I'd hate to lose either of them.