Total War is a technical miracle. I've yet to see any other games have so many animated units on screen in a battle at once. Other games don't even come close. It creates an amazing atmosphere.
RTS games even today limit players to ~200 pop each.
You are still playing with low 1000s of units, and this has been the case for a decade. The AI is also not really much better.
Even on strategy map level it has been simplified.