A lot of people still have a negative opinion on .NET and C# where in fact it's probably the most productive combo and bang for your buck ever made when it come

A lot of people still have a negative opinion on .NET and C# where in fact it's probably the most productive combo and bang for your buck ever made when it comes to the quality of the actual framework, capabilities of the C# language (and to extent the other CLR languages like F#) and tooling. It checks all three boxes. There have been massive improvements in both support and new features after .NET Core came into being. Some people even say that they've been adding too much too fast recently. I don't know how it compares to Java and Go which seem to be the main competitors in that niche (not taking JS/Python/Ruby/PHP etc. into account), but I'd probably pick Go rather than Java myself if I had to abandon C#.