His own decision not to was a personal stringency
But in the absence of such a mesora, there is no advantage (halachically) to refrain from eating them
Open your eyes, Mik5, you are contradicting yourself. How can you say something is a personal ‘stringency’ if it has no basis and is not in any way a ma’aleh?
Forgive me, but I want to reask my question: If somebody made a Kabbalah b’Peh b’Hoketz not to eat Gebroktz on Pesach, would you categorize that as a Neder L’dvar Mitzvah?