I came here for this one. Between the platform convergence and incredible productivity you get with tools like Blazor, I could not be happier. The latest C# language version is also really nice w/ the additional functional paradigms, pattern matching, et. al.

There are certainly a few rough spots on non-windows platforms if you want to port legacy .NET Framework apps, but for most enterprisey use cases, .NET Core is an amazing fit.

The performance also constantly staggers me. AspNetCore is trading blows within the top 10 slots of the techempower composite benchmark these days.