Do manufacturing plants replace?

[Megalou]

Since they occur so late in the game (Robotics advance), it would be strange if they were to replace previous plants. I've never tried building one since I don't want to risk anything on the final stretch.

 

[Grotius]

Good question; I'd like to know the answer too.

 

[Megalou]

I got the answer in another thread: they do not replace other plants.