I'm still confused whether this is a joke or not.
But we already keep stumbling over missing support for the on-demand quote character even with separators like comma and tab, using more exotic characters as the separator will only make it worse. The value of less escaping is negative.
https://www.ietf.org/archive/id/draft-unicode-separated-valu...
https://datatracker.ietf.org/doc/draft-unicode-separated-val...
We write 3.000,00 for exactly three thousand, instead of 3,000.00
Now imagine how often parsing breaks.
I think rarely used ' to group thousands is actually most sensible solution.