The Chicxulub impact killed the Dinosaurs hypothesis is not more accepted, in fact the opposite as it is easily debunked (Honeybees & Alligators anyone).
It's pretty popular in the media because of it's Hollywood type ending and with some Astronomers & Geologist looking for a trip to Cancun, but you will find very few paleontologist who agree with that silly hypothesis.
And your (scientific) authority for that statement is...?