They can be annoying, especially when the random map generator puts one in the middle of colonisable planets, which poses a constant threat of backdoor attacks to your empire, but atleast with Entrenchment, you can have a nasty surprise waiting for the fools coming through

Of course, they offer you the same possibility, and can cut a lot of traveling time for fleets.

yea the mines of vasari are very helpful and the moving base also, so u can say the vasari has almost no problems with worm holes.

too bad i like tec the most