I'm not sure it's our job to keep adding qualifiers to the OP's bold statement that "Simpsons is not considered a sitcom, but it is the longest running show, period." until it's finally accurate.
In any case... PBS' Nova is 47 years old. Frontline is 37. I believe those are aired in prime time. And they are "not considered a sitcom" either.
I'm not sure it's our job to keep adding qualifiers to the OP's bold statement that "Simpsons is not considered a sitcom, but it is the longest running show, period." until it's finally accurate.
In any case... PBS' Nova is 47 years old. Frontline is 37. I believe those are aired in prime time. And they are "not considered a sitcom" either.