In Beta 3 and 4 I would search my planets for artifacts and rarely ever find anything. And if I did, it wasn't so useful by the time I got it.
In my first full SINS game last night I actually found an artifact fairly early on (mid-game, when I was positioning to take the AI on headfirst). It game my ships 10% faster mana, er anti-matter regeneration.
Has anyone else found that artifact-hunting has become more useful in the published game? Or, was it just a lucky find for me, first game through?