[eluser]jedd[/eluser]
[quote author="pbreit" date="1239754254"]What sort of site would you build with CodeIgniter that doesn't have a login?[/quote]
Seriously? Lots of things don't need a login. A blog (if you don't want comments). A photo gallery (ditto). As Fuzzy points out, almost any kind of search engine. Any place, really, that you want to publish information but don't care about who reads it - or rather, who has different levels of access to it.
Quote: Are the authentication differences legitimate or philosophical?
Eh? I'm not the one complaining about a lack of a one-size-fits-none authentication engine bundled with CI .. so my differences are entirely pragmatic.
If you're in the habit of writing systems, and they were similar enough in auth requirements, then you'd just write your basic module and modify it as needed for each project. If you want something more sophisticated and don't have extant code (or particular habits) to modify, then you'd just grab one of the existing auth libraries and wrap your new code around it.
Given that option has always existed, and seems to work well for people in that situation, I'm unsure what the problem is.