Re: I know it's big, but...
Actually, if memory serves me right, the TIE Interceptor didn't enter Imperial service until just prior to the events of TESB. Many of the key designs were taken from Darth Vader's TIE Advanced x1 prototype after The Battle of Yavin.
Another common misconception is that the A-wing was in Alliance service during the events of ANH when in actuality, the A-wing didn't enter Alliance service until some time after. The A-wing was derived from an experimental starfighter the Alliance was testing during the events of ANH, the R-22 Spearhead, and General Jan Dodonna & Engineer Walex Blissex examined the role of speed at The Battle of Yavin.
I need to pull out my reference material and refresh my memory on the exact time the A-wing entered service in the Rebellion. What I do remember is that it was around the period of TESB.
Actually, the R-22 Spearhead was created to explain why the Alliance had A-Wings before ANH in Empire At War. Prior to that there was no a-wing prototype.
If I should die, think only this of me:
That in some corner of a foreign field
There lies a plagiarist.