Children are fairly resilient to change. They adapt easier, in no small part because even with their overloaded routines, they're not so firmly set in their ways.
But a house move is a pretty big change, even in the same town, even for a little person. All those routines are no more. A key source of consistency, security, comfort is upended.
The emotion of loss of the familiar can be eclipsed by the excitement of discovery of the new. New walking paths. A new park to play in. New neighbors. New places to go cycling... like the ice cream parlor. And old things, no longer stored away for lack of space, become accessible and new all over again.
Maybe someday my daughter will make the opportunity for herself to make a big move, maybe out of her home country. For all the adventure that it promises, a big move can be frustrating: things that you took for granted can become marathon struggles. On top of it, the loss of the familiar can wear you down and be outright demoralizing. The adventure is hard to enjoy if it's overwhelmed by enormous effort necessary just to do the basics.
Maybe this little move we've made will give her a few tools or patterns that will help her adjust to the unfamiliar later in life.
Or, more modestly, simply how to overcome the stationary interia that settles in with age.