[skydhash]

The nice thing about REPLs is that you can try random snippets code. And as the sibling comments put it, you rarely switch to the prompt interface. Instead you `eval` a bit of code and it got sent to the running state of your program as if you've typed it as the prompt. It's more like brainstorming a program using a mood board.

You kinda have to keep track of the state, but the latter can be easily inspected so there's no need to keep it your head.

[bandrami]

I'd even say it gives you an incentive to not keep a lot of opaque state lying around and this is a good thing