[SatvikBeri]

I wouldn't think of paradigms as strictly separate, but there are definitely clusters of related techniques that go well together. Higher order functions work best with immutability and pure functions, and struggle without them. Currying is somewhat useful by itself, but much more valuable with function composition or HOFs.

It's also important to teach the techniques together because functional programming tools are typically (deliberately) less powerful, which makes them easier to analyze, but means you need more tools.