Ink isn't a programming language, it's a markup for scripts that branch a lot or have text substitution rules. The FFI means that if a project hits ink's limits

Ink isn't a programming language, it's a markup for scripts that branch a lot or have text substitution rules. The FFI means that if a project hits ink's limits, you can go beyond them. Despite being a markup, ink is very close to turing complete. XML is another type of markup that relies much more heavily on external languages. So I think ink is quite powerful. (at least enough for most interactive fiction!)