But how many times can you take a piece of Ikea furniture apart and put it back together again? I have friends who have moved apartments with the same Billy bookshelf 2-3 times and if they tried it one more time the thing would collapse.

Not to belabor the metaphor as heavily as my friend's Billy, but there's a maintenance corellary to be made here. Most Ikea furniture can be put together once, in one place, and left there for a long time. But once you want to change it in place it may just collapse.