Question about the Corporation buildings... If one switches to a Civic in which corporations have no effect, do the corp'-specific buildings themselves keep fully working? If not, then having ordinary buildings "upgrade" to corp'-specific buildings as outlined above is in my view a problem.
I would be hesitant to build Red Curtains Theaters if it meant that I might lose the theaters' effects entirely if I lost access to the corporation for whatever reason (e.g. a competing corp' was spread to the city). If Red Curtains has no competitors, Civ' Jewellers (as discussed earlier in this thread) certainly does.
Cheers, A.
I did some testing. Corporation buildings stay in effect if you switch to a civic that disallows corporations. You can't found new Corporations, train Executives, or spread Corporations with existing Executives. You can still build the Corporate Store building in a city with the corporation, but the corporation would have to been spread to the city before the civic change.
If a competing corporation spreads to the city, then you lose the benefits of the Corporate Store, but any buildings that the store replaced are reactivated. So in the Red Curtains example, if Mapster (which competes with RC) spreads to the city, Red Curtains Theater is deactivated (it's not lost, but it shows up as a red fist building), but you either regain the ability to build a Movie Theatre or reactivate an existing one.