I’m in no way advocating that people start signing with Xs. I also said: OTHER THAN SIGNATURE. You can certainly be literate without having a good cursive handwriting.
That's true to a point. The point being when all writers of cursive have finally died out and only the historians can read cursive writing. The general populace would not be able to read the Declaration of Independence and other historical docs. It would be as big of an enigma as the Babylonian writings in clay tablets................