Non encoding above 127 ASCII if is UTF-8

[Dzyszla]

Proposal for modify middleware to no encoding above 127 ASCII char code:

var
procedure Middleware(Req: THorseRequest; Res: THorseResponse; Next: {$IF DEFINED(FPC)}TNextProc{$ELSE}TProc{$ENDIF});
  ...
  ops: TJSONValue.TJsonOutputOptions;
begin
 ...
	  if SameText(Charset, 'utf-8') then
		ops := [TJSONValue.TJSONOutputOption.EncodeBelow32]
	  else
		ops := [TJSONValue.TJSONOutputOption.EncodeBelow32, TJSONValue.TJSONOutputOption.EncodeAbove127];

	  Res.RawWebResponse.Content := TJSONValue(Res.Content).ToJSON(ops);
...
end;

Or maybe some other configuration for this? If I want to response with utf-8 charset, why can't use utf-8 charset as is in json?

(this feature can support only by D12 (or some lower, but above D10).