In all fairness, it's no different to any other major iteration of a framework. I imagine that a lot of Ruby developers will be telling their bosses about Rails 6, and trying to push towards it for multi-db support for large applications.

The big difference for me is that many .NET shops rely heavily on certain libraries and tools, and many of them are very slow to adapt. Umbraco, as a prime example, recently upgraded to Angular 2 for its admin section, and is probably a year or two away from an initial move to .NET Core.