I have several pieces that have survived 3-4 moves. The trick is when assembling, use wood glue with any dowels. On their own, these dowels only have friction to hold them in place, and over time, the surface of the area where they are inserted compresses, reducing friction. Hence you get that typical side to side sway. The glue mitigates this problem.
This makes any assembly 1-way, though. Some people (with a very high time:money ratio obviously) might find the collapsible, portable nature of Ikea an advantage.
I've owned a lot of IKEA furniture, and at no point have I ever considered disassembling them. And I don't think IKEA really even advertises their stuff to be a flatpack-to-furniture-to-flatpack design.
I'm sure I'm not the only person to have built a wall unit in a bedroom only to learn, later, getting it out the door, and through the hall, and down the stairs turns out to be job for Dirk Gently.
That said, moving some of this flat pack furniture has been a mixed bag. Some move well, some don't.
I did have a wall unit, a $99 hardware store particle board piece assembled with big screws and those interesting, round cam fasteners. It survived three separate moves, including one where it flew out the back of my pickup truck onto asphalt (thankfully in a gas station, vs the freeway I was about to get on). Corner got dinged, door flew off, but it survived!
But I've had other pieces that assemble and are rigid, when torqued around through the moving process start to come undone. The particle board and fasteners are designed for loads only in specific directions and tend to not do well, and fail, outside of those.
I have several pieces that have survived 3-4 moves. The trick is when assembling, use wood glue with any dowels. On their own, these dowels only have friction to hold them in place, and over time, the surface of the area where they are inserted compresses, reducing friction. Hence you get that typical side to side sway. The glue mitigates this problem.
That said, moving some of this flat pack furniture has been a mixed bag. Some move well, some don't.
I did have a wall unit, a $99 hardware store particle board piece assembled with big screws and those interesting, round cam fasteners. It survived three separate moves, including one where it flew out the back of my pickup truck onto asphalt (thankfully in a gas station, vs the freeway I was about to get on). Corner got dinged, door flew off, but it survived!
But I've had other pieces that assemble and are rigid, when torqued around through the moving process start to come undone. The particle board and fasteners are designed for loads only in specific directions and tend to not do well, and fail, outside of those.