Back in days when paintball guns were whittled from wood, and electronic guns ran on vacuum tubes (haha), a stock board was often semiauto only. A lot of them didn't have much adjustability built into their programs. Sometimes they just weren't great overall boards. Aftermarket boards were something that really gave you flexibility in your gun.
Today, guns come with tons of modes, they're infinitely adjustable, they can have new programming added either by USB or by a factory flash, and best of all, they WORK correctly. Notice Virtue has pretty much gotten out of the gun board market? It's because the need went away.
Now, moving from an LED to OLED, that's a whole other topic.