Whenever I see Repl product announcements, I'm reminded of this quote from Paul Graham.
If you want to take on a problem as big as the ones I've discussed,
don't make a direct frontal attack on it. Don't say, for example,
that you're going to replace email. If you do that you raise too
many expectations. Your employees and investors will constantly be
asking "are we there yet?" and you'll have an army of haters waiting
to see you fail. Just say you're building todo-list software. That
sounds harmless. People can notice you've replaced email when it's a
fait accompli.
I wonder if there's something similar going on with Repl, and if so, what their end goal is.