Keep also in mind that you have to keep OSX updated to the latest version to work with the latest SDK releases. And some OSX updates update the EFI as well so there's the risk that you should have to wait for the patched EFI.
And you're developing an iPhone app? Maybe you don't keep up with the blogosphere, but I think XCode is the least of your worries...
Nonetheless, since then I've lost much of the initial motivation. So I know what you're talking about. Even though for me the reasons are more personal (and difficult to explain). I haven't had many problems with the whole publishing process though.