This is awesome I hope they invest some of that into rebranding as I do believe Repl.it is probably the worst name for anything.
It almost sounds like a nefarious file format or like some software company for the early 90s; maybe that’s the vibe they’re going for.
Even the word Replit looks like “reptile”. I guess it’s very developer-y it’s just grammatically grating on the nerves.
I think it's perfect. Obviously the customer base is never going to expand beyond programmers who already know what REPL stands for, and the full name is a homonym for "replete" which is aspirational for a tool that aims to grow into a more fully-featured service.
On the other hand, the name creates a pretty clear picture of the service to its audience.
If you start looking at demographics outside the audience to qualify the name, then you'll probably end up with an abstract-but-brandable name that communicates less which seems like a regression.