[vletal]

I was into this stuff when Scala was at its peak. I still think that it made me a better developer and it's just fun trying to understand all these concepts, but after several years I came to the conclusion that category theory will never hit mainstream.

Sure, the best ideas are already lurking into mainstream languages, but noone is building Monads and Functors. Implementations used in practice are not pure (flatMap on List accepts Sets/Options...).

These days I would probably jump on the Rust hype train and learned more about memory management and safety instead.