For people saying 'big deal', remember that Emma Bates ran 2:28:19 in her debut at CIM in vaporflys in 2018 and people were going crazy over that. Now Sara has run more than a minute faster on the same course in her debut.
But a big difference was Emma was 26 years old when she did it, Sara is 35. Sara s had a long career of pretty good performances, for Emma it was one of her best races since college a few years earlier and showed she had a future in the marathon.
But maybe Sara Vaughn will be like Sara Hall and suddenly start running the best races of her career in longer distances than she had typically run earlier in her career.