in a lot of the older stories, the stake wasn’t what did the trick
a wooden stake didn’t kill a vampire, and any village plagued by the undead would be ruined to think so
all that the stake did was pin it down, freeze it in place. Some stories even specified the kind of wood, and/or that it had to be driven in with a single blow (two strikes? the vampire gets up and kills you)… others said it didn’t even matter whether it was a stake, a sword, or a bullet. In fact, a bullet to the heart was thought to be a finisher for a vampire where a stake wouldn’t do the job. But then, this was when having a bullet you could fire into a dead body was a new idea.
Restraining a vampire was the point of the stake.
What got rid of it? Decapitation followed by immolation. Set fire to the whole thing. Anything—insects, salamanders, etc.—that flees out of the fire is the vampire escaping.
Because in the end, vampires are a plague metaphor, or a plague in supernatural anthropomorphic form. And missing the smallest detail can ensure the contagion persists and spreads.