Does it really matter? Editing abilities will make your map more disorganized and your loading time will still increase because you modified the ability. Loading time is increased by custom data, so if you make 100+ custom units without editing them it wouldn't increase loading time.. I think.
If you don't want a long loading time, there's always Widgetizer.
Btw, even 200+ custom objects without using Widgetizer increases loading by only ~30 - 45 seconds. |