I'm not sure how many airlines besides Southwest and JetBlue make it a standard practice to reach out and compensate people who were on flights that experienced major delays, without waiting for the passengers to ask. This is the gold standard of customer service.
On United I've had delays on ORD-LGA and then been compensated with bonus miles under their Business1 guarantee. They reached out and compensated me.
Though it's been awhile and I have no idea if this still exists.
But I just wanted to point out that this is not
completely new.