Can AI wipe out other empires?

[Haig]

I feel that in Civ V the AI is capable of conquering walled cities better and there is no Loyalty system.

Can the AI even take many cities in VI?

 

[Shirotora Kenshin]

It happens, but very rarely. Really if you want a better AI in Civ6, do yourself a favor and use RomanHoliday‘s AI Rework Mod.