The cost of these places also is pretty substantial. Really should consider what is the value of stored items if replaced with new, compared to storage cost. Especially with furniture like say beds or sofas. But why not everything else.

Does it really make sense to store. And do you actually want to reuse it. Especially if it is say some particle board and not full wood.

It's often a form of kicking the can down the road. As you write, not cheap, but easier than sorting and making decisions. But you're often just making it someone else's problem.