The above comment has been put on hold because it is primarily opinion-based.

Seriously, there are things that Play users legitimately want to discuss that are not appropriate for stack overflow.  Getting opinions on X vs Y, finding out if anyone has tried X before, validating design approaches, and help with debugging very specific issues, and talking about Play, roadmaps, timing of releases, etc etc, these are all things that the mailing list is good for, that if you posted to Stack Overflow, will be rejected.