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I've read this argument several times in several places and I'm still unclear how this is substantively different than setting up whatever arbitrary state you want to work with in tests and dropping into the console from there. Super open to be enlightened, but up this point I haven't been persuaded.

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Ok, so after RTFA I think the only thing described that I can't do in Elixir is seamlessly move state from the REPL to the code. The utility of that for me doesn't feel huge. Yes, I will copy and paste a line from the console to the test or the code, but (a) I don't think that's really slowing me down a ton and (b) it gives an opportunity to ensure that the thing I'm moving is exactly what I want.

Because you don't just drop into the reply in tests. You can drop into the repl on a production system. Or during a live dev env. No more guessing what the input was that blew things up, your gonna do that investigation on the real patient.

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