Trailing commas are of course very sensible! This doesn't seem simpler than JSON otherwise, though, e.g. type declarations and optional quotes. Why is leaving

Trailing commas are of course very sensible! This doesn't seem simpler than JSON otherwise, though, e.g. type declarations and optional quotes. Why is leaving interpretation up to the reader desirable? Shouldn't things always come out the same? Asterisks are an unusual choice of comment syntax. What if your comment needs to contain an asterisk? Why not "//..." and/or "/* ... */", or "#..."?