Can anyone shed som light on the ubiquitousness of support for pg_service.conf?
AFAIK same non-support for JDBC and Node.js
Are there any other mechanisms with broader support, that can be used instead of pg_service.conf (if support is scarce beyond what builds on libpq)?
Not that I am aware, though programmatically accessed libraries are somewhat able to be adapted using custom wrappers so that the pg_service file contents can be leveraged.
David J.