It's like opening a restaurant when one of the menu items aren't ready yet. I mean if you're going to launch a product, you should make sure you have every model available the day it goes on sale. If not, make note of it from the beginning that it'll arrive later, instead of placing an order saying "surprise, you need to wait 4-6 weeks despite ordering at 12:01." Then you cancel the order to order another watch and you lose your place on line.
I knew from the beginning my ship date was going to be 5/13-5/27 for my space black SS 42mm which I'm fine waiting for. I didn't want to settle and just get one that shipped earlier just to have it. So I'm fine waiting.