I have the following exercise in my textbook:
This weekend costs / is costing me a fortune — but it’s worth it.
It is asked to choose the correct or more natural form of cost.
The correct answer is costing. It does make some sense to me: the situation is temporary. But why is the present simple not appropriate here?
For example, the present simple can be used here:
This cake tastes wonderful. Where did you buy it?
Both “cost” and “taste” can be seen as stative verbs to which the present simple, to my knowldge, should apply. Why such inconsistency?