The basic answer is: The chulent which is served hot is the Oneg Shabbos mitzvah by day.
If you didn’t have any chulent Friday night; the chulent that you eat Shabbos day would be much more enjoyable.
For this reason, some b’dafke won’t eat certain delicacies Friday night so they will enjoy them more on Shabbos day, even if they were available for both meals.