I think it MIGHT be worth it for some specialized niche that isn't covered yet, but yeah I've tried several Rails-oriented IDEs like RubyMine, etc. and nothing

I think it MIGHT be worth it for some specialized niche that isn't covered yet, but yeah I've tried several Rails-oriented IDEs like RubyMine, etc. and nothing really "feels" right compared to XCode. For some reason, using Eclipse doesn't really bug me that much on Windows, but on OS X it's just really frustrating. I'd argue that it would be very difficult to make a better XCode or a better vim, but there's probably room for a better TextMate or "XCode for ____".