This is something that I always think about when people mention guillotines and why the example is so stupid to me. The aftermath of the French Revolution was bad for the Feudal Monarchy, but also wasn’t good for Robespierre and the Jacobins. If you recall, he was also beheaded by the guillotine after shooting off his own jaw and the sans-culottes were repressed by the bourgeoisie after the revolution “stabilized”. It’s critical to have a well-developed plan in any power vacuum or there will be far more bloodshed, instability and other bad guys will just take over.