I am currently playing World of Warcraft Classic.
As before, when Ulduar appears, I know that the previous raid achievement reward flight mount can no longer be obtained even after completing the achievement.
In World of Warcraft Classic, I hope that it will remain obtainable rather than unobtainable anymore.
Of course, can get other flying mounts through ulduar raid achievements, but different in other forms.
I suggest that continue to earn flying mounts that reward previous raid (1-phase Raid) achievements in the future, if not immediately.