(I already posted this reply on his blog, but seems like it has been deleted along with a bunch of other disagreeing comments there)

What if you want to add a new element at the top? And even when you need to add it at the end, if you use a decent editor, it won't make a difference. For example, with vim:

(Place cursor on last element) A,<cr>myNewElement

As opposed to left comma style: o,<space>myNewElement

Only 3 extra keysrokes for both cases. (<cr> is the Enter key, by the way)

I can't believe this kind of post could make it to the front page of Hacker News.