It is picky, but picky is good. It's explicit which creates uniformity. For example with niri, if you forget quotes on a string value, you get this error.

It is picky, but picky is good. It's explicit which creates uniformity. For example with niri, if you forget quotes on a string value, you get this error. $ niri validate Error: × error loading config ├─▶ error parsing ╰─▶ error parsing KDL Error: × identifiers cannot be used as arguments ╭─[config.kdl:42:1] 42 │ // Disable acceleration. 43 │ accel-profile flat · ──┬─ · ╰── unexpected identifier 44 │ } ╰──── help: consider enclosing in double quotes ".."