[army]

I think the lack of highlighting and indentation support in some of those tools is a pain and adds unnecessary mental overhead.

Whether a candidate can reason about the correctness of their code without using a debugger is a useful data point though. Both in a more abstract way and by manually tracing at least part of the program instead of stepping through it with a debugger. If you struggle to manually trace code in your favorite language, that raises some questions in my mind.