[deccan]

Taqwus said:
SE IV has a greater transition between a decent possibility of turtling (minefields, weapons platforms, combat satellites, choke points; compare to weak Dom II province defense) to the eventual Hammer of God technology (ability to generate own warp links giving insane mobility past even deep defenses, ability to detonate stars wiping out all ships and planets in the system, ability to smash planets) which guarantees that stalemates are remarkably unlikely to be permanent.

There are system gravitational shields, no? So you can turtle indefinitely if you want.