The language of the amendment is irrelevant to whether the amendment can be repealed. Once it’s repealed, it’s repealed.
Yes, it SAYS “all persons.” But it was intended to protect freed slaves. Since they are all now dead, the amendment should be repealed. And 150 years of ABUSIVE INTERPRETATIONS (The “incorporation doctrine,” Roe v. Wade, anchor babies, etc., etc.) of the amendment would be swept away.
The 13th Amendment would remain. The repeal of the 14th Amendment would not legalize slavery.
If 38 states go for repeal, it would happen. However the Constitution prohibits ex post facto laws [Article 1, Sections 9 & 10] so repeal would have no impact on anyone or anything that occurred before the repeal was adopted.