...doesn't really go into stuff like this anymore.
Understood it as statement of such modular concept not made anymore...
And that is not true. There are many such modular concepts, the "top" one is the track lighting used nearly everywhere in the commercial sector.
But each sword has two cutting edges:
On that film it looks nice, when all components have precisely the shape they should. But once there is some deviation (slight damage,...; happens very frequently), the whole concept collapses and it becomes a nightmare to keep the thing together, because there is no "tradditional backup" for the installation. But that is common drawback of all such "quick assembly" concepts...