Should "Application Services" be available as "Assignment" in "Config Contexts"?

[mathieumd]

I wonder why Application Services are not available to assign a Config Context, while both Tags or Roles are.

One use case I stumble upon is to assign specific configuration (a Zabbix template to monitor Apache metrics).

I cannot use Role because it's single-valued, and we already use it for functional roles ("Application server" vs. "Infrastructure server"), and "Apache" is not a functional but a technical role. Moreover, the same server would have more roles: "MariaDB", "PHP", etc.).

Sure I could go away with Tags. But I feel Application Service is the correct way; if it were available in Config Context, of course.