@finestructure Used to Swift, freaked out by no static types in Python? You can still write great software, but your relationship with unit tests is going to change!
Used to Python, think Ruby syntax is too weird, too full of hidden magic? Your relationship with readability is going to change; aim for domain-specific idioms, not universally recognizable lego pieces.
Used to Ruby, angry at Swift’s type strictness? Change your design process to lean on the type system.