Aka a completely different use case than CSV.

> Aka a completely different use case than CSV.

How many CSVs are generated, edited, or viewed by Notepad.exe and how many by Excel (or Google Sheets)?

I would posit the vast majority of CSVs are generated through some kind of program where you go to File > Export or File > Save As…. In which case doing selecting a drop down with the option for File Format to be TSV or DSV (with the corresponding file extension) would solve a lot of problems. (Or at least if CSVs from Excel were RFC 4810 compliant by default.)

How many get edited or inspected in notepad at some point in their life? Nearly all of them (for any given workflow).

It is nice that text editors are abundantly available and that they can be used for the task. But once the CSV columns get too wide and irregular, then you probably want to reach for a dedicated spreadsheet program, because it is otherwise too hard to figure out which column you are currently reading.

There is still room between a text editor and a full-blown spreadsheet program. New DSV editors could emerge when the DSV format gains popularity.

> when the DSV format gains popularity

CSV is equivalent to Voyager I, the chances of catching up with that kind of head start are extremely low.

At the point someone is using a different format, they’ll likely pick something explicitly structured. Like everything from JSON, to Yaml, to Protobufs, or hell even XML.

DSV seems like worst of both worlds. Not really structured, AND also not really viewable/editable by lowest common denominator tooling.