Many languages look similar, and familiarity feels simple. Ruby however has a lot of idioms fairly unique to the language, and what is different is mistaken for

Many languages look similar, and familiarity feels simple. Ruby however has a lot of idioms fairly unique to the language, and what is different is mistaken for complexity. I'd call promises in Javascript complex. A block is Ruby isn't complex, it's just weird if you're new to the language.