Turrets on big ships are an essential part of any self-respecting futuristic space admiral’s futuristic space navy. Fighters are great  for defending your capships, but they can’t be everywhere at once. So automatic turrets are a must for keeping your futuristic space paintwork free of scratches and bullet holes.
Predictably, I’m telling you this because I’ve made some.
So, you may have noticed these turrets aren’t very smart. They shoot straight at you, rather than trying to lead you. That’s intentional – they’re meant as an area-denial method rather than aiming at killing you. Well, except… ok, scratch that, they’re a stupidity-denial weapon. If you’re stupid, they’ll kill you. It’s a fast-feedback, short-generation Darwinian loop for the elimination of dumb tactics.
And if they don’t kill you, they limit your options to give your enemy a concrete home-team advantage. While you’re worrying about whether you can turn without a turret filling you with futuristic space lead, your opponent is free to fly normally and fill you with futuristic space lead. This also means you can’t just go and obliterate the enemy’s fleet in the first few seconds; it takes a while before you’ve done enough damage to slip through and hit them with the good stuff. Oh, and no spawn camping.
The turrets are also designed for the “trench run” effect – it feels pretty badass to fly along a capital ship bristling with weapons, dodging streams of tracer fire. Looks good too.
Obviously, this is pretty simple for now. The turrets are maybe a bit too stupid; going near an enemy capship should probably be a bit more hazardous. The first thing I plan to add are more types of turret. There will be various classes of turret, designed for different roles. The basic minigun turret here is point defense and fighter defense. Freespace/BSG style flak guns (firing shells which explode at a set distance into a cloud of shrapnel) would provide shorter range but larger coverage defense, while missile turrets and more exotic weapons would be used against heavier ships.