Buildings have completely revamped way of obsoleting now.
Now they are completely purged from cities, when player gets tech, that obsoletes them.
Several buildings now get relic variant when they obsolete like Angkor Wat.
When building obsoletes, and other needs it, then its treated as building always was there.
X needs Y, Y obsoletes before X.
You can still build X in cities, where you didn't build Y before its obsoletion.
This means easier time of building cities in later eras, as you now don't have to worry about obsoleting building requirements.
Tens if not hundreds of buildings could get Relic variant - that is building obsoletion could act as downgrade, since building isn't that relevant any more.
Also few thousands more of buildings could obsolete at some point.
There is 6136 buildings + 25 projects, and 2514 buildings are obsoleted at some point.
Now they are completely purged from cities, when player gets tech, that obsoletes them.
Several buildings now get relic variant when they obsolete like Angkor Wat.
When building obsoletes, and other needs it, then its treated as building always was there.
X needs Y, Y obsoletes before X.
You can still build X in cities, where you didn't build Y before its obsoletion.
This means easier time of building cities in later eras, as you now don't have to worry about obsoleting building requirements.
Tens if not hundreds of buildings could get Relic variant - that is building obsoletion could act as downgrade, since building isn't that relevant any more.
Also few thousands more of buildings could obsolete at some point.
There is 6136 buildings + 25 projects, and 2514 buildings are obsoleted at some point.