I really hate to bring up the generics point, but I did really miss them when I used Go. Sure, you can ignore their absence, but every time I saw a API that took or returned `interface {}`, I felt like the type system was being wasted. Other than that though, Go is definitely on favorite languages to watch from afar.
Regarding the Acme text editor - any users of it here, on HN? I'm really interested to hear some arguments from Acme or Sam userbase - what do you find useful in these editors?<p>I vaguely remember the reply on Acme's mailing list, that it is a text editor, not a rainbow, when someone asked about syntax highlighting feature :)