I felt that I'd reached a point of reasonable proficiency with the language, and since I'd been learning it mostly for my own entertainment I decided to turn my attention to some other new hotness (Rust, IIRC) rather than slog through increasingly more difficult and obscure (to me) features of the language with diminishing returns for my personal projects.
Entertainment is maybe not the right word, though it was definitely entertaining. Learning Haskell was the beginning of a personal renaissance in my approach to programming, and as a self-taught programmer (and professional software engineer looking to expand my horizons) that was a huge deal.
No, not at all! I previously thought you meant "Haskell was
hard for me to learn because I couldn't even learn lens"
when you meant "I learned a lot of Haskell but couldn't be
bothered to learn lens"
Entertainment is maybe not the right word, though it was definitely entertaining. Learning Haskell was the beginning of a personal renaissance in my approach to programming, and as a self-taught programmer (and professional software engineer looking to expand my horizons) that was a huge deal.