My 1 1/2 -2 hour limit is imposed by my bladder capacity, not my fuel tank. Subcompact car with 6 gallon tank, small pickup with 12 gallon tank, van with 30 gallon tank, motorhome with 55 gallon tank, all can do more distance than I can, so why not top off the tank whenever I need a comfort stop?
For my frequent travels from NE Oklahoma to Michigan, the greatest advantage of long range capacity is avoiding a fill-up in Illinois, and hoping that the gas I buy in Indiana will cover all my Michigan driving. Only the van, with 480 mile range, offers such hopes.