Looks really nice, and it's cool to see something like this implemented in reason (OCaml really), but I don't see $35 worth of value compared to VSCode or MacVIM.
If you're going to stare at your editor much of every workday, does the price really matter that much? Even if it only makes you a bit happier than alternatives do, the price difference per hour used will be tiny.
I'd wager most software developers can shell out $35 on a whim.