I describe exactly what I get. Whether they're "faux" depends on your definition.

No, seriously, that's really profoundly true. Erlang's definition isn't the only one. But you're free to take it. If you can bend a bit, though, these may not be "faux".

One thing that's easier when it comes to implementing supervisors in not-Erlang though is that the vast majority of languages have something better than "behaviors" to work with, which are bizarrely klunky things. I actually implemented something more like a "gen_server" initially, but it wasn't a win. Some of that "incredible programming" is essential complexity (in Fred Brooks' terminology), but some of it is accidental complexity. Plus Erlang had to build it from true, total scratch; Go is a pre-existing runtime, and "defer" is simple, yet powerful.