Ask HN: Which back end framework would you choose for a startup in 2018?

I have never built a web application besides ultra-simple RoR apps. Preferably, I would like a framework that makes refactoring easy, quick development possible and has great maintainability.

Java-Play, Ruby-Rails, Python-Django, C#-ASP.NetCore2, Go-?

I am tempted to go for C#-ASP.NetCore2 given that I prefer statically-typed languages. However, I am not sure why it isn't popular amongst the HN crowd. Java-Play seem like a similar alternative, but I hate Java's verbosity.

RoR and Django seem to be in the same category.

Go seems to be made for experienced developers that know what they are doing.