I must be missing something - I don't find Rubymine or Pycharm (or Webstorm) to possess anything that IntelliJ doesn't. I use Goland on the side, fine, but the

I must be missing something - I don't find Rubymine or Pycharm (or Webstorm) to possess anything that IntelliJ doesn't. I use Goland on the side, fine, but the other three seem fully-incorporated into IntelliJ. What am I missing? I gather that at one point, they might have been ahead, but updates are fast and frequent these days. (I say this having just shifted projects from both Rubymine and Pycharm into IntelliJ recently, having wondered what I was doing.)