Rare resource exploitation continue after Ecumenopolis conversion.

[TheConundrum]

2.7.1. All DLC. Ironman/no mods.

An example was done with the Rubicator world. Built the rare resource extraction buildings. Convert over the Ecumenopolis. Rare resource depots are gone, buildings gone -but planetary production still shows resource extraction.

EDIT: Bonus is lost after building is made.