> I'm personally a big fan of TOML, but maybe YAML is still better for highly-nested data.
That is also my experience. TOML is really cool for simple key/value stores, but keeping everything linear in config makes nesting error-prone, eg with [[table.subtable.list]] to append an item something to table.subtable.list. It's really easy to miss a nesting level by accident.
Also related, newcomers in TOMLland find it really confusing that appending a single line to the configuration file will append it to the latest defined table, not as a top-level key.
That is also my experience. TOML is really cool for simple key/value stores, but keeping everything linear in config makes nesting error-prone, eg with [[table.subtable.list]] to append an item something to table.subtable.list. It's really easy to miss a nesting level by accident.
Also related, newcomers in TOMLland find it really confusing that appending a single line to the configuration file will append it to the latest defined table, not as a top-level key.