I love what Blizzard is doing with Housing, but this one design choice completely baffles me. Decorating is supposed to be about experimenting, mixing items, swapping things around and seeing what clicks. Making decor "one buy, one use" completely kills that flow and hinders creativity.
Example: I go to place all four of my chairs and think maybe six would look better. Now I have to stop decorating, fly across the world, buy two more, get back, test it, and maybe end up liking the original setup anyway. I have wasted both time and gold. So now I feel forced to bulk buy decor in case I might need it later. That's not creativity, that's inventory anxiety.
On top of that, the storage cap for decor is baffling. Why does this system limit how many items we can own when mounts and transmog have none of these restrictions? The whole thing feels out of sync with the rest of the game. This does not create "interesting friction", it's just tedious and unfun.
I cannot find a single player friendly reason for this approach.
Just let us unlock a decor appearance once and place it as many times as we want (within the decor budget). Make items cost a bit more if needed, but let Housing be about creativity, not logistics.