We have all been addicted to that idea but it just does not happen in a balanced 3-factions game unless unfair conditions are present.
"Unfair" conditions would be:
- low population (e.g at night or after server restart for maintenance) (i.e. game not working under intended conditions)
- uneven populations (i.e. game not working under intended conditions)
- permanent double-team vs. one empire (i.e. human factor making the game a 33% vs. 66% until your empire is contlocked and/or people start logging out feeding the uneven and low pops issues)
- significant hacker problems (i.e. not working as intended)
When you say "knocking out the enemy for good and starting over", I am not sure you realize what it technically implies. If the game is balanced at all, it means you will have 66% of player population (the 2 other empires) stacking on your to wipe you out as soon as the game restarts. And then the question is: should the game restart as soon as the 66% have eliminated 33% pop or should it stay 50% vs. 50% until one of the two empires left wins ?
Then there is the "unfair" conditions. How would you feel if your empire was wiped out during one of those and you can't play anymore ?
Events are one way to give a clear "goal" and a clear "winner", a game in the game. "Victory conditions" (what definition may be understood by that expression) are another.
I believe PS should have mechanisms in place so that you can pound an empire to the ground without breaking the game. It's like bending a material that takes back its shape: it takes a lot of energy, skill, effort and most importantly, it can be done. But in the end, everything returns to equilibrium naturally through the natural 3-factions gameplay (even if it went through "unfair" conditions).
That would be the real beauty of Planetside.