If only...
Every time I have to do any major work with CSVs, I re-lament this exact thing.
I think the only way this could ever become more widespread is to fix all the open source tooling so that it's eventually just supported everywhere - then keep evangelizing for... ~30 yrs.
Probably you should also register a new mime type and extension and make it a new thing - don't overload .CSV any further - but make the same tooling support it.