I started using the separator symbols (file, group, record, unit separator, ascii 60-63 ... though mostly the last two) for CSV like data to store in a database. Not looking back!
ASCII 60-63 is just <=>?
You probably mean 28-31 (∟↔▲▼, or ␜␝␞␟)
Unless this is octal notation? But 0o60-0o63 in octal is 0123
I've wanted to do that but don't you have compatibility problems? What can read/import files with those deliminters? Don't people you are working with have problems?