I remember when I was becoming dati at a Chabad house outside Boston the Rabbi said that it was a fairly common thing for families as they move to greater observance that driving to shul would be the last non shabbos thing that they would give up.
It kind of makes sense if you think about it, if you are a family out in the suburbs somewhere with nothing in walking distance and you decide to become religious you will need to move to be in walking distance of a shul, but of course moving house can not in most cases be done overnight, it takes time.
And just to be very clear the rabbi was talking about the case of a family transitioning from secular to shomer shabbos and being somewhere in the middle for a time, nothing else.