I think that a lot of people find that LYAH makes you feel like you're learning, but have difficulty actually applying/using the concepts. This is compounded by the lack of exercises.

I definitely agree with this review: https://bitemyapp.com/blog/functional-education/

The material often bores learners and leaves them feeling like they're not "getting" it. This is because they're being "talked at" and demo'd to. They're not engaging with and solving problems.