one other thing why www is good for SEO. shitty URL parsers. lets say you make a press release. there is a high chance that www.example.org gets automatically parsed into a clickable link (sometimes it's nofollow, sometime it isn't) - on the other side, there is a high chance that example.org does not get parsed into a clickable link, so you would have to write http://example.org to make sure that it get parsed into a link, which is just ugly - and - most of the PR stuff are reluctant to do.

some URL parsers have caught up to non-www domains if you have a .com domain, but try it with an .io domain. it fails most of the time.

that means there are some interesting hipness tradeoffs

  * if you have a cool .io domain
  * you should have an uncool www

on other thing about non www domains. journalists always get it wrong: whatever you do, whoever you pitch, as soon as you end up in a big and might print newspaper (that also has a website) you will see your domain with www again.