Don't know about other trains but if you look in the past this train was just a namesake SF getting with lots of slack but very few halts at the same time.
Then in zbtt they speeded up the UP train by 2 hours and DOWN one by more than 5 hours especially speeded up in WCR and CR.
But still I have seen that once it's delayed by more than half an hour it simply looses it's priority. Then controllers treat it as it was before zbtt.
Also...
more... it's name is there in the trains to be LHBfied in 2021 list but still running with ICF rake and inspite of running full entire year it has got no increase in frequency so even it's home zone is least bothered about the train.