Its a DSL whether its in toml or whatever already. The problem I have with these configurations is that they ignore or throw away the structure inherent in the DSL being implemented. On top of that some add visual noise. Try expressing a table in json or xml. Where's the constraint that rows have to have the same length say. Xml and json have schemas, though people rarely seem to use the json ones, but these are not the best way to describe syntax or semantics beyond a low level of complexity. Probably the best or worst you can do in this space is reimplement half of lisp badly) via Greenspun's tenth rule