zlacker

Which well-defined interface? Most Unix tools communicate through text pipes, and provide their result in whatever random format the author likes that then requires significant effort to parse correctly.

>>pezezi+(OP)
Traditional Unix tools have well-defined text interfaces. Well-defined =/= universal, or well-designed, or even easy to parse...some RFCs are rough to implement parsers/validators for, but I digress. My point is that it is easier to replace an individual Unix tool, that it is to replace a systemd subsystem.