1)
Why does the Torah add the words "Ad ha'Yom ha'Zeh"?
1.
Ramban #1: Because Hashem destroyed every last Egyptian horse, chariot and rider, 1 leaving Egypt a lowly nation, without horses, without chariots and without an army.
2.
Ramban #2 (citing the Ibn Ezra): Because all those who chased after Yisrael were destroyed, together with their offspring in Egypt, 2 so that nothing remained of the entire family. 3
3.
Seforno: Because all the Egyptian officers together with all the soldiers perished at the Yam-Suf, a blow from which they had not recovered forty years later, when they had still not been replaced.
