By stacking, I mean adding the units together on a single tile into armies so the units all fight together. Civ VI does have this, but in a very limited capacity (as you mentioned, up to 3 units). Older games had many more stacking possibilities (Civ III actually had infinite unit stacking, which was cataclysmically crazy lol, but I think Call to Power II really struck a good number with a max of 12 units in a tile)
Civ 3 and 4 would be so much more tolerable if the stacks were limited to something like 12. I haven’t been able to go back to those games since 5 changed it up, the stacks of death are too much for me
By stacking do you mean combining units to form a single stronger unit? If so, Civ 6 has that, albeit only up to three units.
By stacking, I mean adding the units together on a single tile into armies so the units all fight together. Civ VI does have this, but in a very limited capacity (as you mentioned, up to 3 units). Older games had many more stacking possibilities (Civ III actually had infinite unit stacking, which was cataclysmically crazy lol, but I think Call to Power II really struck a good number with a max of 12 units in a tile)
Civ 3 and 4 would be so much more tolerable if the stacks were limited to something like 12. I haven’t been able to go back to those games since 5 changed it up, the stacks of death are too much for me