.NET Core 3 [makes it easier to code more performant JSON (de-)serializers](https://devblogs.microsoft.com/dotnet/announcing-net-core-3-preview-2/#introducing-a-fast-in-box-json-writer--json-document); it may make sense to rework JSON5.Net on top of that. In fact, the design document/roadmap even mentions [comments](https://github.com/dotnet/corefx/blob/4ce6355d59623a198f06f23f9753c40d1cf8fb15/src/System.Text.Json/roadmap/README.md#jsonreaderjsonwriter). Possibly not worth the effort of a complete rewrite, but I thought it worth mentioning :)
.NET Core 3 makes it easier to code more performant JSON (de-)serializers; it may make sense to rework JSON5.Net on top of that.
In fact, the design document/roadmap even mentions comments. Possibly not worth the effort of a complete rewrite, but I thought it worth mentioning :)