[remline]

As my last project developed, I moved it from simple bash scripts directly to (mostly) python utilities that had their own DSLs.. ansible, supervisord.. I expected to need to look into their source, but given the workarounds in docs and web searches that never seems to need to happen.

The resulting configuration is all configuration and not hardcoded paths mixed with Popen and random custom parsing..

I would consider custom python worse than writing bash with too much logic in the cases where you could just exit with a failure.

I think the question for your coworkers is what are they reinventing and why do they think a custom remake of it isn't a waste of everyone's time? Further, why do they think they will be more employable after making embarrassing custom internal tools? Compare that to knowing how popular tools work and perhaps contributing something small to one of them or at least being able to answer a question about them.