I realized that, ever since getting married, we've moved condominiums/houses four times already in the last two years. Looking back at my childhood, I remember my parents moved us four times, but that's for my whole childhood until adulthood. I think it's a testament to both our generation's mobility and the fact that housing is too expensive to purchase outright that this is the case for most of us young parents.
Still, when considerations about where to raise one's kids are at the forefront, the difficulties of moving houses is just a minor concern.