I think you're being unfair. There's nothing bug ridden or inconsistent here, just a simple categorization system that looks like it would be pretty decent for small to medium sized projects.
It's also not informally specified. The shared link is literally the specification document. It's written in a kinds of informal style, sure, but that's a different kind of informal - Greenspun's informal means "not written down at all".
I suspect that rsecora was going for humorous parallelism rather than meaning any dig at the linked project.
Re:Johnny Decimal
by frabtanium on Thursday June 15, 2023 @08:26PM
(#36349143)
This is exactly why the name was chosen (I'm Alex).
https://johnnydecimal.com/00-09-site-administration/01-about...
Any sufficiently complicated library management system contains an ad-hoc, informally-specified, bug-ridden, inconsistent implementation of half of the Dewey System [2].
[1] https://en.wikipedia.org/wiki/Greenspun%27s_tenth_rule
[2] https://en.wikipedia.org/wiki/Dewey_Decimal_Classification