The position of a king without an heir is not so stable, because once an accident occurs, the succession to the throne will face many problems.
In the Europe of this era, accidents are not uncommon. Especially after the development of rifle technology, there have been more ways for a king to be assassinated.
One of the reasons Carlo continually boosts his reputation in Spain is to avoid being assassinated by the Spanish people every day.
This is no joke. Prime Minister Prim in history was killed in an assassination, which also made the Spanish Savoy Dynasty a laughingstock, a joke that lasted only a few years before it was forced to give up itself.
On the day Prince Juan Fernando was born, many factories in the suburbs of Madrid were brightly lit. Many of these were printing presses, which had close cooperation with various newspapers, needing to urgently print news about the birth of the royal family's eldest son and sell it in major cities around Madrid the next day.
