Real-time strategy

Real Time Strategy is inherently unrealistic or dull/uncontrollable other than at the scale sweetspot or without strong unit AI. What do I mean by that? In a realistic world, collecting resource, building structures and engaging in battles occurs much slower than in a game. To make the game more realistic (ie slower) but retain the players engagement, the scale needs to be increased (larger map, more units). However, if you scale it up too much, the game becomes uncontrollable as there are too many units, and too much going on for the player to control. Hence there is a scale sweetspot, not to small scale (too dull for the player), not to large scale (uncontrollable for the player).

Unit level AI reduces the micromanagement of units, allowing the player to efficiently control a larger number of units. This extends or moves the sweetspot (it moves the sweetspot if players like unit AI so much they would always use it, and therefore would find a smaller scale game dull) to larger scale games.

The advantage of turn based strategy is that turn length can be set to any increment of time: 1 second, 1 minute, 1 hour, 1 day, 1 week, 1 month, 1 year, 1 decade, 1 century, 1 millenia, or any increment in between. Thus is allows realistic, yet playable, modelling of the real world at any scale.