I don't understand if this is meant as a joke or not. Do you mean that we then would have Tsvlens? Tabs don't automatically make columns aligned, nor do they eliminate the problem of quoting. I don't get it, but then again, I'm exceptionally dim-witted.
Other people have mentioned a lot of advantages but I'll go for another one: TSV is eminently more readable and parsable just off the bat. Empty space is always more readable than `,`, and `,` appears a lot in strings, tab appears a lot less.
TSV are far superior to CSV as the separator is a TAB and not commas, semicolons or other weird stuff depending on your locale. Same for single and double quotes. Only thing to be aware are tsv created by Excel with newlines embedded in text fields, which are a huge PITA for almost all parsers.
Because tabs are flexible space, you can render them really wide in most text editors, wide enough that all the columns line up. But it is a hacky solution!