Nathan Lopes Cardozo said this quote

“ In a remarkable midrash (commentary) on Proverbs, we read the following: “All of the festivals will be abolished in the future [the Messianic Age], but Purim will never be abolished.”The miracle of Purim is very different from the miracles mentioned in the Torah. While the latter were overt miracles, such as the ten plagues in Egypt and the splitting of the Red Sea, the miracle of Purim was covert. No law of nature was violated in the Purim story and the Jews were saved by seemingly normal historical occurrences. Had we lived in those days, we would have noticed nothing unusual. Only retroactively are we astonished that seemingly unrelated and insignificant human acts led to the redemption of the Jews. The discovery that these events concealed a miracle could only be made after the fact.Covert miracles will never cease to exist explains the Torah Temimah. In fact, they take place every day. The midrash on Proverbs is not suggesting that the actual festivals mentioned in the Torah will be nullified in future days. Rather we should read the midrash as follows: Overt miracles, which we celebrate on festivals mentioned in the Torah, no longer occur. But covert miracles such as those celebrated on Purim will never end; they continue to occur every day of the year. Purim, probably rooted in a historical event of many years ago, functions as a constant reminder that the Purim story never ended. We are still living it. The Megillah is open-ended; it was not and will never be completed! ”