They may wish to, but should we be actively recommending it in our installation docs, or simply describing how to install with the latest version of everthing?  This is something most users are unlikely to care about.  This wasn't specific to Ice--I've rationalised much of the installation docs recently for Linux and Windows, to remove ambigious options (like: we described four different ways to install java, now there's two with one being recommended), and this is doing the same for Homebrew.  This depends upon the focus of the installation docs: do we describe a clear simple way to install a working system with a few caveats where needed, or do we have it describe every possible variation even when the variants have limited value?  The latter was making the documentation exceedingly confusing and ambigious; keeping it simple doesn't mean the other options aren't possible, just that by default we describe the recommended way.