Few things get in the way of work like rebuilding your office space.
On the other hand, I'm installing bookcases for roughly a thousand books and increasing the available floor space, while making room for new bookcases to go in the dining room from whence these ones came.
My office space has a tendency to accumulate clutter, deteriorating over time until it resembles a dank hole with far too many trailing mains extension cables. Getting on top of it is probably going to be a net win in terms of productivity over the next year — it's just a pain while I'm doing it.
(More thoughts on something profound when I have something profound to think about, rather than how to wedge an extra filing cabinet between a bookcase and the window casement. You know how it goes ...)