On the flip side, had the non-avian saurians not been wiped out we would not exist.
Picture the impact being a glancing one so still bad but more like a Mini KT not full extinction level event.
The good news is by just over 6.8MYa the descendants of one of the many bipedal species probably the Hadrosaur, or Troodon would have reached a late Stone Age existence, figuring out that growing their own crops was a much more reliable food source.
By maybe 5.2MYa they would have reached the early Space Age.
FTL Spin Drive (tm) breakthrough maybe by 4.7MYa assuming they figure out how to avoid blowing themselves sky high in the process.