Not really, because it's only optimal in 2d.

Most of us don't live in Escheresque labyrinths

You don’t have to move house many times to realise that yes, we do.

If you've ever moved any furniture at all, you'll notice that it's often much easier to get around corners (or through doorways), if you can turn them sideways.

That's especially easy to imagine with tables, but sofas also count.

There are also sofas that can be easily taken apart. Eg one of our sofas at home, an L-shaped sofa, comes apart into two pieces.

Not a problem, we can just shape it like the space covered by rotating the whole thing and make the sofa kind of "bone shaped", then we should be set for 3 dimensions. The only remaining issue would be, where to put the actual sitting area on the bone, but that problem I leave for homework.

3dimensions still allows for more freedom than that though since the couch can stand on end.

I would contend that it's still useful since you'd be able to turn the corner without over-complicating it by getting it into some weird tilt position.

> Not a problem, we can just shape it like the space covered by rotating the whole thing and make the sofa kind of "bone shaped", then we should be set for 3 dimensions.

That might give you a feasible solution, but I doubt it's optimal.