I too don't see why tsv is better than csv. That said, as many people have pointed out, commas have legitimate uses in fields like Address of a locality etc. an

I too don't see why tsv is better than csv. That said, as many people have pointed out, commas have legitimate uses in fields like Address of a locality etc. and this could cause a problem in scripting. About exporting using random characters, I have found that ~ (tilde) is almost never seen in actual data, hence it can be used as a field separator in most cases. Another safe choice is the | (pipe) symbol. (In Windows, you can change the field separator in the "Region Settings" - a rather weird place to have that setting.)