Step-by-step reality.

In TBS games, it often happens that whoever goes first dominates and even wins easily, simply because they were faster in researching, building a structure/unit, or capturing a valuable location. In other words, the reaction time factor, which some dislike but can be easily improved to a minimally acceptable level by even a complete beginner in just a few games by memorizing a couple of hotkeys, is replaced by a completely unfair distribution that cannot be countered at all. And if it's a civilization with simultaneous turns and you're at war, then everything again comes down to reaction time – who moves their units faster, but unlike in RTS games, this is implemented in a very crude and unbalanced way, like a monstrous workaround.