Note that that page forgets to actually make an argument against unquoted keys.
The "Why not JSON5, JSONC #1, HJSON or HOCON instead?" answer says it's because of "unquoted strings", then links to a section that only talks about unquoted values. JSON5 doesn't have unquoted values.
The "Why not JSON5, JSONC #1, HJSON or HOCON instead?" answer says it's because of "unquoted strings", then links to a section that only talks about unquoted values. JSON5 doesn't have unquoted values.