These answers will vary wildly from person to person, but for a lot of people the answers to those questions will definitely provide a "good reason to move away from Ruby on Rails, Django, Node, etc."
You get similar syntax to Swift whilst leveraging the best server side libraries available on any platform.
I’d rather use just about anything else. If I could use C# everywhere, I would because Microsoft really knows how to cater to developers like no other company and their tools are second to none in many cases.
Compare that to go ( which still has npe) or rust ( whose borrow system appears to be a real pain point) and i think it has an edge.