Does it make sense to use static variables in the main function in C?

Does it make sense to use static variables in the main function in C?

As far as my current understanding of the 'static' keyword goes, it
prevents a variable from being re-initialized AND it prevents the variable
from leaving the memory when a function ends.
In C, I usually use this when a variable doesn't need to be global, but
also shouldn't change in between function calls. (f.i. microcontroller
interrupts)
Now, in some C code for an STM32, I saw the following:
int main(void)
{
static char buffer[CONSOLEBUFFERSIZE];
...
To me, this doesn't make sense. This variable is used to buffer incoming
commands in order to process them when the termination character is
received. But the two properties of 'static' I described earlier do not
apply to the main function because main() is called only once and 'never'
ends. So my actual question:
Could this be using some hocus-pocus that I don't know about or would it
simply be copied code from an interrupt or other function and did the
programmers forget or not bother to remove the static keyword?