I've noticed that my latest posts in the functional fundamentals series have not been particularly well read. In all honestly, I don't think they were particularly good either, and they were not subjects I cared about all that much.
In fact the requirement to order things in a series has been detrimental to just about everything. I've also started to think that a series trying to cover such a huge topic is not ideal for dev.to, were it might instead be better to reference the writings of others, such as this excellent piece on polymorphism, whereas trying to make a complete series myself would put me in a competing position. A series is better suited for a book.
Considering that I've also gone over most of what I believe to be the core of functional programming - except higher-kinded types, but I should have done that before Category Theory - I think this is a good time to wrap it up.