I moved multiple times with my IKEA furniture, including disassembling some. They’ve lasted fine these past five years+. Not sure why people think IKEA furniture is “disposable” and do not last.
However, if you just look at IKEA stuff and compare how it evolves over multiple rounds of assembly and disassembly, there are products that are very hard to disassemble without breaking them and products that are fairly okay to disassemble and reassemble. As others have commented, it varies.