That isn't solving anything, just changing the problem. If I want to store a string containing 0x1C - 0x1F in one of the columns then we're back in the exact same situation while also losing the human readable/manually typeable aspect people seem to love about CSV. The real solution is a strict spec with mandatory escaping.

There's just no such thing as a delimiter which won't find its way into the data. Quoting and escaping really are the only robust way.