> any references/benchmarks for some realworld apps/services?

.NET 6 is vastly more performant than .NET 5, which was already faster than openjdk and openj9 (https://devblogs.microsoft.com/dotnet/performance-improvemen...)

> and also what do you mean by oracle suing if you implement value types?

this one shouldn't need an explanation, oracle very commonly pursues frivolous lawsuits as a way of bullying money out of businesses that don't have the budget to fight them for years in various courts.