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I used to use it in college to program at the library. I haven't used it in at least 5 years though. I believe it was also useful to learn a new language in an environment where I couldn't install software.

I still use it occasionally as a scratchpad for working things out, especially in languages I'm not as familiar with. Figuring out how to use a standard library function, class inheritance behavior, edge cases like null handling.

I definitely don't see myself ever needing to pay for their product. I'd guess the play is to get into B2B or EDU as a hiring or education platform.

For context, the hn post was submitted by replit’s founder.