But then, you still have to put up with defining potentially hundreds of <bindingRedirect>s in config files to even get an application to run correctly, even though they mostly don't share their DLLs.
The only thing it takes is Nuget dowloading a newer version of some dependency another library depends on, even if it's backwards compatible with the old API. Which, of course, it should always be if you haven't switched to a new major version.
Edit: Also, I find it very disturbing that the resulting errors always happen to be crashes during runtime instead of up-front. If that happens with a plugin or through reflection: fine. But for most of .NET code, dependencies should be able to be loaded during startup.