Quite many competitors cast without a stop and continue accelerating until the line is released and then slow down so that rod does not hit water too hard. Principle there is to achieve higher line speed when there does not come intentional slowing down. Line loop is kept narrow using an overhang and then rod tip path which inevitably turns down does not open the line loop too much because there is a length of light line between rod tip and line rear end. Obviously then there comes more out of rod straightening because line release can be delayed. Rod will straighten without a stop anyway!
Overhang also lessens the Tailing Loop which comes because of too abrupt acceletarion in the beginning of the cast and most likely the TL which come when stop is done too early/high so it acts like a shock absorber