Super weird. I didn't know about that.
Probably the state invested so heavily in the sector that they created a bit of a bubble. Then to have them slow down suddenly would pop it.
I think it's wasteful but not as bad as having not enough houses for everyone and a housing market that's sucking most of the populace dry.
With a bit of innovation, maybe the market will find a use for all the apartments.
I don't know about fastest. Don't Japan hold that title?
I'm just talking about the scale of them, and the average speed that they can manage (very important when looking at the scale of distances to travel).