I've noticed that some carriers seem to be suggesting that there might be no impact to flights, but isn't this an immediate grounding for each aircraft until the update is made?

How is it possible that this wouldn't impact upon flight schedules?

The grounding is for 6000 of 11000 A320 series. I believe it's some combination of software and hardware configuration that is at risk.

N of 1, but I’m stuck in phoenix overnight because our flight was delayed an hour and a half by airbus maintenance and we missed our connection.