Because of that, I've been rolling my own basic backend for my own personal use on projects for myself, friends & family for about a half-year now; the ultimate goal being dead-simple templating using standard HTML pages, fast & secure data & code, and ease of extensibility. It does what it needs to. But, because it's domain-specific, I'm not trying to make it a general-purpose "CMS," so I currently don't have to worry about stuff like registration/authentication, comments, etc. I would never release it in its current state, though, and likewise I'd probably never plug a bunch of other junky code into it, expose a ton of dubiously-designed interfaces & reflection as "extensibility," require master pages (ew) or some custom markup language (ew x 2) to make templates, and call it a full CMS.