Hello -
I too have found that debugging is a challenge when a service's stdout/stderr aren't captured automatically. From my point of view though, the issue is not just that certain binaries lack syslog support: since a service implementation's gexp can do much more than just exec a binary, and since mistakes in gexps usually go unnoticed until a runtime, I've found it easy to write scripts that trigger fatal Guile errors before the service binary is even started (syntax errors, missing `use-modules` declarations, etc.)
Will the solution proposed here capture output for this class of errors as well?