https://cwi.com.br/blog/comparando-o-system-text-json-com-newtonsoft-json/
Accordingly to some benchmarks, System.Text.Json is much more performatic than Newtonsoft.Json and it is part of .NET implementation.
https://learn.microsoft.com/en-us/dotnet/standard/serialization/system-text-json/migrate-from-newtonsoft?pivots=dotnet-8-0
In the actual scenario is difficult to use System.Text because of EnvelopeSerializer and other serialization converters, that use Newtonsoft implementations.
https://cwi.com.br/blog/comparando-o-system-text-json-com-newtonsoft-json/
Accordingly to some benchmarks, System.Text.Json is much more performatic than Newtonsoft.Json and it is part of .NET implementation.
https://learn.microsoft.com/en-us/dotnet/standard/serialization/system-text-json/migrate-from-newtonsoft?pivots=dotnet-8-0
In the actual scenario is difficult to use System.Text because of EnvelopeSerializer and other serialization converters, that use Newtonsoft implementations.