Step-by-step reality.

on a real game map

Something similar happens in TBS games.

based on the events unfolding during the game

Just like in TBS games.

where sometimes you need to perform things like instant buying and selling

I see this more often in TBS games than in RTS games. As well as instant unit repurchase.

with combos

The same as monitoring, say, mines in Heroes.

and make all decisions right now, not after ten minutes of deliberation

IT'S A MATTER OF PREFERENCE.