Not who you’re replying to, but Rust lacks things I assumed were basics in any modern language, like random number generation, JSON handling, and regex. I understood the reasoning once I looked into why, but it was still startling at first.

In contrast (I know this is apples to oranges), Python’s stdlib is incredibly broad. colorsys lets you convert between color spaces. plistlib lets you read and write Apple’s property list files. graphlib has a topological sorter, which can lead to hilariously short interview questions when the interviewer isn’t familiar with Python’s stdlib.