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Are there any modern languages that support REPL-driven development as described?
The closest experience I've had to this style of programming is using Rstudio and evaluating lines, modifying them, and rerunning. I've found this style of programming a little difficult. It's imperative that you rerun from scratch regularly so that the state in your living instance doesn't digress from the theoretical state obtained from running your source.

Ideally for me, I'd prefer to just hit a button and it rerun to the same place instantaneously (with a full debugger to deeply inspect state, of course).