After the last devlog I had the basic controls for scrolling and zooming a larger level. Mostly for a laugh, I threw in 1000 units and set up a huge battle. Tha...
I also think that this scenario you are using to test is not very representative of actual gameplay if this will be a classical RTS.
With 1000 vs 1000 units I would guess that the pathfinding and especially collision avoidance between tanks, when they are actually controlled by a player, will be the much bigger performance challenge and will also cause a lot more delta updates which probably drastically reduces your current bandwidth savings.