I mean, there's a _lot_ to dislike, but it mostly boils down to this being a physical object system applied to digital objects, and I disagree with every single premise in the list of reasons they give for having created it in the first place. For instance, there's a whole section on how "Search doesn’t help" which ends with "You can search for things, but the results are garbage." - the author hasn't considered that maybe search is garbage for them precisely because they're trying to apply physical object system to digital objects. I don't know about you, but Spotlight on my Mac finds exactly what I'm looking for every single time, because we use simple naming conventions.

I also hate the absolute waste of human cognition this system causes making people try to memorise which number is at the start of a folder name they're looking for. From their own examples, a folder called `22 Contracts` is going to be sorted into a different position in a list than it would if it were just named `Contracts` - without the number, I both know exactly what the name of the folder I want is, and where it will appear in a directory listing. With someone else's choice of number at the front, I know neither of these things.

Basically, every single thing this claims to solve is either not a problem in the first place, is trivially solved without making people learn a stranger's personal numbering preferences, or is made considerably worse by this system.