At first my thought was "Star Destroyers are TIE Fighter factories?" But apparently, all Imperial capital ships (Acclamators, Victories, Interdictors, and Imperators) have a certain limit as to how many squadrons they can release in a battle. Acclamators have 4 TIE Fighter squadrons and 2 Bombers. ISDs have about 10 TIE Fighter squadrons and 4-5 TIE Bomber squadrons.

 

They way it works, so I've seen, is that the ship launches a certain amount of fighters (the Acclamator launches one Fighter and one Bomber squadron each, the ISD launches about 3 Fighter squadrons and 1 Bomber squadron), and as soon as one squadron is destroyed, another of its kind replaces it. When the limit has been exceeded, no more fighters of that type replace it.

 

I tested this out. In the space tutorial, I sent useless sortie after useless sortie of TIE Fighters after the space station (intentionally letting them get gunned down by Z-95s) and lo and behold! No more TIE Fighters after 4 tries of that!

 

It's not exactly canon, but it's nowhere near as bad as we've thought. We could simply mod in the Interceptor as one of the fighters that, say, an ISD launches.

i didn't know they were limited, i just though - like the at-at u can only send say x squads at once...but after theyre down another x squads etc. but for space combat the limit is a good thing