Hi,
I still use the 12V system, precisely because of all the remote-controlled accessories.
It doesn't matter what train I have running, but I can control all the points from one central location.
I have some of the old 4.5V battery trains, some of the newer remote control trains, but run them all on the 12V rail system.
My system is placed on two table tennis tables, side by side in my hobby room.
This also leaves room underneath for storage.