I ran into a use case where I needed to evaluate a NULL value in a number field. As it turns out all blank answers are interpreted as zero which numerically is invalid. 0 != NULL as any programmer knows.
I was able to work around the issue by creating a mirror field of the number and leaving the conditional value blank/ But having to create a mirror field to handle a NULL value in a number field is a cloogey workaround.
I am requesting a condition for numbers to match when they are blank (NULL) that is not interpreted as a zero which is a value. This may also apply for other fields but most especially applies to numbers.