> How robust/mature is it as of yet? More importantly, how are compile speeds and how much of a priority are they to the compiler maintainers? I too find it quite promising in terms of "a language aiming for the benefits of Go with the expressiveness and added easier correctness of FP".

I never get the compile time argument. Well I code a big Scala application and the most time it spents is integration testing. the 10 minute test suite would probably still run 9 minutes and 30 seconds on go. we heavily rely on the database and cover a lot of concurrency/parallelism things in our tests. some things which we would need to test in go, too.

the compile time argument always looks good on first, but later on it's just a dumb way to prefer a language since it never matters. (Actually even the go maintainers didn't cared for a while about the compiler performance).