The ol' bump in the slippery slope. The least fun construct in gamingPxtl wrote:@Eman
The problem with starting defense is that the game can get "moribund" (I forget who coined that term, but I love it) - that is, the game is won, but the attacker needs to tech up in order to make the kill. If home base has defenses, attacker eradicate's defender's army (but leaves home defenses) and claims surrounding territory, laying siege. He then has to wait to mount a force capable of breaking the home defenses.

[edit] ya, as pressureline says, it's a scalar thing, early base defense can just be centralized anti raiding. It doesn't have to be the end all stop all preventing the opponent from finishing you before they have teched to T2. That's one of the things I really disliked about evo, the early game citadel was just ridiculous.