You can also turn off implicit returns in Civet if you don't like them. They also work well with TypeScript annotations: if you annotate a return value of `void`, then there's no implicit return.

I agree it can be easy to make and throw away big arrays if you're not aware of what's going on. But it can also save a lot of time. For loops as arrays are super useful, integrating the equivalent of "map" into the language itself. We also recently added generator versions (for*). JSX is a nice example where for loops as expressions and implicit return are powerful; see e.g. https://civet.dev/reference#code-children