> It makes commenting out columns painless. No it does not. If you have to comment out the first column you'll have to remove the comma from the second column.

> It makes commenting out columns painless. No it does not. If you have to comment out the first column you'll have to remove the comma from the second column. It's the same problem that happens if you put the commas at the end of the line, except that the offending line will be the last column. So putting commas at the beginning just makes it look weird because it differs from how we use commas in natural language.