They don't work perfectly fine. Random inconsistent locations, random inconsistent rules for inclusions and imports, Random ill-documented ad-hoc formats, no s

They don't work perfectly fine. Random inconsistent locations, random inconsistent rules for inclusions and imports, Random ill-documented ad-hoc formats, no standard interfaces to add/remove/set config values, no ability to put ACLS on individual config entries, basically no way to export and re-import or auto-merge partial config, without at least screwing up whitespace and comments or risking duplicates, no ecosystem wide single 'source of truth' pattern. They work, but they're not nice.