When they initially announced that we'd be able to switch our Pledges from whatever we have to Switch, I excitedly followed their Link only to find that no, I couldn't. My pledge was locked in to Steam. I vented to their support stuff though and got surprised when they said there was a mistake, and offered to change it. Now I'll be getting it for Switch after all!
So if you were in the same boat as me, you should try talking to them. I had backed the 35-bucks digital deluxe steam version, not the 10-bucks version, so that tier might still be unable to switch though.
Discussion started at here by Amadox