Kaiser might be surprised at the overuse and confusing nature of terminology in the modern note taking space now. Somehow the terminology still suffers from lack of consistent and fixed terminology.

Fungible: items that are equivalent or consist of many identical parts such that, for practical purposes, they are interchangeable.

Commodity: an economic good, usually a resource, that has full or substantial fungibility: that is, the market treats instances of the good as equivalent or nearly so with no regard to who produced them.

There's some flawed logic here in that Ward Cunningham outlined his version of a wiki and others who created versions thereafter modified and potentially expanded on that original "definition". We now have a general consensus of a wiki, but it's not necessarily the same for everyone. Scheper doesn't leave any fungible room in the semantics of his argument here and thereby forces one into a practicing the "one true way", which doesn't exist as even Luhmann's own practice varied over time.