Maybe it all has something to do with the fact that the runways at Jax are old as fuck and need some work anyway. I have landed and bounced a 250K E-6 there many times and the pavement somehow survived. I even did a RON there, fueling up to around 300K and we somehow didn't sink into the pavement. The 737 is NOT a heavy airplane at all, those runways are long overdue for some work.