So with the OT firmly behind us and Disney releasing new movies every year I think it is safe to say that those cinematic battles from Episodes IV through VI are gone.
The days of Han Solo trying to fight his way out of a swarm of Academy Pilots are gone. And Accretion is the reason why If I may be so bold.
Take a look at the top meta. What ships are on the table that were in Return of the jedi? Aside from a Palp Ace it is the Lambda Shuttle and the TIE interceptor. But A-wings, B-wing, TIE bombers, and most notably the (T-65) X-wing are no where to be seen at the Top 4 of nationals or worlds. But if you take a look at the design model Accretion is almost inevitable. The design was to regularly release waves and with each wave is a set of new ships. No wave ever released a ship that was already out (Wave 6 being the exception but you could argue that a Scum-Z95 is different enough from a Rebel Z-95 Headhunter that it still follows the rule).
So with new (T-70) replacing the old (que in animated gif that was too offensive to show). The T-65 is essentially replaced.