Thanks for keeping the built-in "println" function. The Go spec threatens that it may be dropped in any release, but having to type fewer letters is invaluable for debugging.
Also, importing fmt adds at least 100 Kb to the final binary. Using println instead of fmt.Println helps to save precious space on embedded systems and it makes "Hello world" compiled with TinyGo very small, just a few kilobytes, which is an amazing selling point.