I did not dive into the onion thing. My time is limited, and I just read that tip of mr. Kunikow: [Functional Programming] Domain Modeling Made Functional (Pragprog) (F#). The writer of that book is also a nice humoristic and clear presenter. I can recommend
https://www.youtube.com/watch?v=AG3KuqDbmhM on the subject of a comparison of oo and fp dependency injection (it comes a bit later in the presentation).
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