For me, coming from Java it was a breath of fresh air simply because of the simple build setup. (Modern) Java requires gradle (which is a magical setup, written

For me, coming from Java it was a breath of fresh air simply because of the simple build setup. (Modern) Java requires gradle (which is a magical setup, written in a language totally dead outside of gradle scripts), special magic for a "fat jar", and even then it doesn't create a exe/elf at the end. And the build is fast - even on a raspberry pi. Oh, and the IDE environment is amazing - you literally don't need much more than VSCode or vim (the language tools have built in refactoring support, formating, quick compile for syntax error, godoc). And you have closures, something Java didn't have until 8, and even now many libraries don't support it.