I've seen that as a direct contrast between film and short story in illustrating the dynamics of the Del Mar marriage. In the film, it seems as if they move to town as a direct consequence of Alma's "cain't we move to town?" plea - as if Ennis goes along with that in order to placate her, or make up to her that he against her will subjects her to "what she hates". At any rate, Alma wants them to move; - and they do.
While in the short story, Alma under the same circumstances (in bed with her husband, etc.) pleads that they should find some better place to live, but they very pointedly don't, because Ennis favours the flat above the laundromat since it can be "left at any time". Ie. Ennis doesn't want them to move - and they don't.
What do you make of the point that short story Ennis favours the laundromat flat that can be left at any time? Any thoughts on why that is so important to him? I see the point of having jobs he can quit easily, but why feel the same about their home? It gives the impression of him feeling like a refugee in his own life, always on the verge of having to flee from something rather than to something.... perhaps that is the point.
I'm totally with you regarding the movie. Alma wants to move - and they move. I don't think he's following her suggestion because he wants to make up for "doing what she hates". I think they move because
- she has some good points (foremost Jenny's asthma spills, then other children to play with for the girls, she is lonesome)
- he takes the line of least resistance (very Ennis!)
- he tries to be a good husband
- he loves her
In the story, it's more of a compromise: Ennis wants to move out of town again, to a lonsemoe ranch, but Alma wants to stay in own and find them a better/own place there.
They stay in town, like Alma wants, but they don't "get a place" (=rent better place or buy a place?) and stay in the little appartment, which Ennis prefers.
As to why Ennis prefers the appartment, which can be left at any time:
He is stuck with what he got, caught in his own loop, as he (later) says to Jack at the Siesta. Living in a place that can't be left at any time would increase this feeling of being cought.
Kind of last straw for Ennis, he can't leave the life he leads, but at least the appartment could be left at any time. A straw to cling to.