There is a "brick wall effect" within MSFS. If you use "real-world weather", or any WX program...you will experience a sudden change in variables, that is not realistic.

MSFS atmosphere is not truly dynamic in change. On the software level, you simply fly from one grid, to another.


Yes, I have responded to Overspeed Warnings in cruise, (the tick you refer to?) But in the the real world, most airlines do not fly at VMo in the A320, or any other transport category aircraft, so you have a performance margin to work with, above planned speed (as determined by a fleet/flight/operational CI and GW/ZFW on most Boeing/Airbus aircraft) before you get a Master Warning/Overspeed condition.