Unless you’re Cape Air it’s damn near impossible to overnight a good amount of airplanes there. Having friends at Massport and all over the airlines I can tell you they have a huge daily headache trying to allocate extra gates at the int’l terminal, north cargo, and even on / near 14/32 just for RONs on a normal night. Delta keeps teasing it as a hub, for awhile it was officially, then lost the title, gained it again then lost it. Not sure of the status right now.