Possible, or even likely, but interesting nonetheless. Towards the end of the article, they describe an interesting other direction of their research that's not so directly correlated with sunk cost:
> More recently, we’ve been examining a related form of hesitation. This time, it’s not in switching paths, but in committing to one at all.
> “While it might seem that having enticing options (e.g., a great apartment one could rent, a fun event one could sign up for) would make commitment easier, we’ve found that it’s often the loss of a great option that finally pushes people to choose. People often hold out for something even better, but the disappearance of a pretty good option inspires some pessimism that encourages people to grab onto what is as good as they can get for now.”