Well no said that it was a huge deal. The point was that msft is horrible at naming things. Do you have any example of something like this happening in any other ecosystem?
"
In summary:
ASP.NET MVC 5:
ASP.NET MVC 5 was a short-lived successor
to ASP.NET MVC 4.
It was released alongside ASP.NET Web API 2 in 2014.
It actually ran on top of ASP.NET 4 (i.e. .NET 4.x version of System.Web.dll). Note that the entire
ASP.NET MVC library is now obsolete.
ASP.NET 5 was EOL'd and rebranded as ASP.NET Core and it includes the functionality of "ASP.NET MVC 5" built-in.
ASP.NET Core 1 and ASP.NET Core 2 can run on either .NET Core (cross-platform) or .NET Framework (Windows) because it targets .NET Standard.
ASP.NET Core 3 now only runs on .NET Core 3.0.
ASP.NET Core 4 does not exist and never has.
ASP.NET Core 5 exists (as of August 2020) however its official name seems to be "ASP.NET Core for .NET 5" and it only runs on .NET 5."
Again, not a big deal in retrospect now that it has stabilized. But it was a huge deal. Because you couldn't easily figure out if you needed to use Asp.net MVC, or if that version is now deprecated, and if the core you're using means dotnetcore or aspnet core on framework... again, it's the type of stuff that matters when it happens and leaves a mark afterwards.
"
In summary:
ASP.NET MVC 5: ASP.NET MVC 5 was a short-lived successor to ASP.NET MVC 4. It was released alongside ASP.NET Web API 2 in 2014. It actually ran on top of ASP.NET 4 (i.e. .NET 4.x version of System.Web.dll). Note that the entire
ASP.NET MVC library is now obsolete.
ASP.NET 5 was EOL'd and rebranded as ASP.NET Core and it includes the functionality of "ASP.NET MVC 5" built-in.
ASP.NET Core 1 and ASP.NET Core 2 can run on either .NET Core (cross-platform) or .NET Framework (Windows) because it targets .NET Standard.
ASP.NET Core 3 now only runs on .NET Core 3.0.
ASP.NET Core 4 does not exist and never has.
ASP.NET Core 5 exists (as of August 2020) however its official name seems to be "ASP.NET Core for .NET 5" and it only runs on .NET 5."
https://stackoverflow.com/a/51391202
Again, not a big deal in retrospect now that it has stabilized. But it was a huge deal. Because you couldn't easily figure out if you needed to use Asp.net MVC, or if that version is now deprecated, and if the core you're using means dotnetcore or aspnet core on framework... again, it's the type of stuff that matters when it happens and leaves a mark afterwards.