Or perhaps they don't want features they find elsewhere. My biggest complaint with existing CMSes is that while they are flexible enough to do what you need, they have a lot of extra baggage along with them.

Ironically, I'm in the testing stage for my own fourm system . . .

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I wanted to explore how Perl's closures can be manipulated, and ended up creating an object system by accident.
-- Schemer

Note: All code is untested, unless otherwise stated