I can't figure out what's happening here. Is everything just a string? They complain about how YAML handles booleans (fair criticism), however I can't see how NestedText fixes this.
This feels far inferior to TOML (everything NextText does, and much more) or JSON (very unambiguous, works natively in most languages).
I see this a lot in startups and open source projects. They exist solely as a criticism of their competition (which is fair!), but don't work to understand the real problems and fix them in any meaningful way. You can spot them when they talk a lot about what's wrong with the competition ("AWS is too expensive", "YAML is too ambiguous") but never explain their solution.