Castles

[Vivid]

I know the extra trade routes and EP modifiers obsolete with economics.

I know the defensive bonus remains with the exception of gunpowder units ignoring said defensive bonus.

I think I understand how the game classifies units..

With that being said what about the other late units? Like armour units, choppers, etc.

Do they also ignore castles?

 

[oranges]

Yes, everything post-gunpowder ignores it. However, the bombardment reduction still works in a curious way so your artillery or bombers will take longer to bomb down 40 cultural defense in a city with a castle than one without.