The exit condition always comes first, especially for travel planning; it is not just a small factor to evaluate, but a potential stop condition.
Before convincing ourselves, we must anticipate the worst-case scenario: a local event can make a destination unfeasible, even if it appears validated on paper.
In Brussels, failing to check the calendar of the Auto Show or a major concert at Heysel can mean exorbitant prices for accommodation and endless traffic jams.
This turns the dream destination into a logistical nightmare, canceling out the advantage of any initial planning.
The risk of such a drawdown is too high to consider it just a simple component.