> We built Repl.it to make it easy to explore and learn languages and programming paradigms. We were, however, surprised by how slow-moving the programming language space seems to be.

But also: You have to build a REPL.

If I'm constrained to a 60s (50s?) interaction model with my language, how am I gonna build an innovate language? See https://www.youtube.com/watch?v=HnZipJOan54&t=394s for my take on PL innovation - can't happen in repl.

That said, this is great, I'm all for encouraging experimentation.