> You cannot edit it in regular editor, like csv/tsv/jsonlines.
If only there were shortcuts on modern operating systems to allow us to do things that aren't readily on our keyboards. Like upper case characters. Or copy and paste. Or close windows. Our lives would be so much better.
If ASV had caught on, there could be common shared shortcuts to type them, and fonts would regularly display them (just like the unicode characters proposed). But CSV was simple enough and readily type-able.
> There is no schema or efficient storage, like binary formats.
I'm not quite certain where you're trying to go with this. Binary formats aren't really meant to be human readable in an average text editor. It doesn't know to differentiate 1, 2, 4, or 8 bytes as an integer or a float. Even current hex editors to make it easier to navigate these formats don't really know unless you are able to tell it somehow.
> There is no wide library support.
It's a critical mass problem. Not enough people are using them, so no libraries are being made.
> Not all data is representable.
I'm not quite certain what data couldn't be represented. f you can represent your data in CSV, you can represent it in ASV. It's all plain text that gets interpreted based on what you need. They're nearly a 1:1 replacement. Commas get replaced by unit separators, new lines get replaced by group separators. Then you have record and file separators to do with for further levels of abstraction if you need.