The benefit would be EASY cross platform support. From experience building Vagrant installers: it's a pain in the butt. Shipping a single binary client would probably simplify things greatly.
There are two reasons I rewrote Foreman in Go. You hit one of them square on the head. A single binary with no dependencies that can be cross-compiled on a Heroku dyno makes things much simpler.
Foreman was originally written in Ruby which ideally means it runs on any machine with a Ruby interpreter. When you get down to it, though, the differences in fork/exec between Ruby 1.8, 1.9, JRuby, Rubinius, etc make this a nightmare scenario of a different sort.
