Yes.
@Nate_Pearson used to provide some updates in a thread ~18mths ago when they first started to make the changes, and it was talked about on the podcast. Now the changes seem more like tweaks and it’s a bit of an easter egg to notice if a workout has been replaced or changed out.
Spanish Needle. Mary Austin and a few legacy workouts certainly were modified and the new variant is the one in the plans. Not sure if there is an official change log though.