My question which I have raised before on YW is that the Shalosh Shevuos seem to be Agadeta, and therefore not binding in any way. (See Mevo Hatalmud about the status of Agadeta.)
I believe it is Agadeta because the Maharsha brings it in the Chiddushei Agados (small font), not the Chiddushei Halachos (large font).
Furthermore, not a single one of the codifiers brings it down l’halacha. You will not find it in the Rif, Rosh, Ran, Mordechai, Rambam, Tur or Shulchan Oruch.
Therefore, why is it any more binding than the concept of Zugos (not to drink even numbers of cups of diet coke).
Nobody has been able to answer me. If you have an answer, please give it directly, and not refer me to any sefarim which I may not have available.
Many thanks.